'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

var deindent = require('de-indent');
var he = require('he');

function _interopDefaultLegacy (e) { return e && typeof e === 'object' && 'default' in e ? e : { 'default': e }; }

var deindent__default = /*#__PURE__*/_interopDefaultLegacy(deindent);
var he__default = /*#__PURE__*/_interopDefaultLegacy(he);

const emptyObject = Object.freeze({});
const isArray = Array.isArray;
// These helpers produce better VM code in JS engines due to their
// explicitness and function inlining.
function isUndef(v) {
    return v === undefined || v === null;
}
function isDef(v) {
    return v !== undefined && v !== null;
}
function isTrue(v) {
    return v === true;
}
function isFalse(v) {
    return v === false;
}
/**
 * Check if value is primitive.
 */
function isPrimitive(value) {
    return (typeof value === 'string' ||
        typeof value === 'number' ||
        // $flow-disable-line
        typeof value === 'symbol' ||
        typeof value === 'boolean');
}
function isFunction(value) {
    return typeof value === 'function';
}
/**
 * Quick object check - this is primarily used to tell
 * objects from primitive values when we know the value
 * is a JSON-compliant type.
 */
function isObject(obj) {
    return obj !== null && typeof obj === 'object';
}
/**
 * Get the raw type string of a value, e.g., [object Object].
 */
const _toString = Object.prototype.toString;
function toRawType(value) {
    return _toString.call(value).slice(8, -1);
}
/**
 * Strict object type check. Only returns true
 * for plain JavaScript objects.
 */
function isPlainObject(obj) {
    return _toString.call(obj) === '[object Object]';
}
/**
 * Check if val is a valid array index.
 */
function isValidArrayIndex(val) {
    const n = parseFloat(String(val));
    return n >= 0 && Math.floor(n) === n && isFinite(val);
}
function isPromise(val) {
    return (isDef(val) &&
        typeof val.then === 'function' &&
        typeof val.catch === 'function');
}
/**
 * Convert a value to a string that is actually rendered.
 */
function toString(val) {
    return val == null
        ? ''
        : Array.isArray(val) || (isPlainObject(val) && val.toString === _toString)
            ? JSON.stringify(val, replacer, 2)
            : String(val);
}
function replacer(_key, val) {
    // avoid circular deps from v3
    if (val && val.__v_isRef) {
        return val.value;
    }
    return val;
}
/**
 * Convert an input value to a number for persistence.
 * If the conversion fails, return original string.
 */
function toNumber(val) {
    const n = parseFloat(val);
    return isNaN(n) ? val : n;
}
/**
 * Make a map and return a function for checking if a key
 * is in that map.
 */
function makeMap(str, expectsLowerCase) {
    const map = Object.create(null);
    const list = str.split(',');
    for (let i = 0; i < list.length; i++) {
        map[list[i]] = true;
    }
    return expectsLowerCase ? val => map[val.toLowerCase()] : val => map[val];
}
/**
 * Check if a tag is a built-in tag.
 */
const isBuiltInTag = makeMap('slot,component', true);
/**
 * Check if an attribute is a reserved attribute.
 */
const isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
/**
 * Check whether an object has the property.
 */
const hasOwnProperty = Object.prototype.hasOwnProperty;
function hasOwn(obj, key) {
    return hasOwnProperty.call(obj, key);
}
/**
 * Create a cached version of a pure function.
 */
function cached(fn) {
    const cache = Object.create(null);
    return function cachedFn(str) {
        const hit = cache[str];
        return hit || (cache[str] = fn(str));
    };
}
/**
 * Camelize a hyphen-delimited string.
 */
const camelizeRE = /-(\w)/g;
const camelize = cached((str) => {
    return str.replace(camelizeRE, (_, c) => (c ? c.toUpperCase() : ''));
});
/**
 * Capitalize a string.
 */
const capitalize = cached((str) => {
    return str.charAt(0).toUpperCase() + str.slice(1);
});
/**
 * Hyphenate a camelCase string.
 */
const hyphenateRE = /\B([A-Z])/g;
const hyphenate = cached((str) => {
    return str.replace(hyphenateRE, '-$1').toLowerCase();
});
/**
 * Mix properties into target object.
 */
function extend(to, _from) {
    for (const key in _from) {
        to[key] = _from[key];
    }
    return to;
}
/**
 * Merge an Array of Objects into a single Object.
 */
function toObject(arr) {
    const res = {};
    for (let i = 0; i < arr.length; i++) {
        if (arr[i]) {
            extend(res, arr[i]);
        }
    }
    return res;
}
/* eslint-disable no-unused-vars */
/**
 * Perform no operation.
 * Stubbing args to make Flow happy without leaving useless transpiled code
 * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/).
 */
function noop(a, b, c) { }
/**
 * Always return false.
 */
const no = (a, b, c) => false;
/* eslint-enable no-unused-vars */
/**
 * Return the same value.
 */
const identity = (_) => _;
/**
 * Generate a string containing static keys from compiler modules.
 */
function genStaticKeys$1(modules) {
    return modules
        .reduce((keys, m) => keys.concat(m.staticKeys || []), [])
        .join(',');
}
/**
 * Check if two values are loosely equal - that is,
 * if they are plain objects, do they have the same shape?
 */
function looseEqual(a, b) {
    if (a === b)
        return true;
    const isObjectA = isObject(a);
    const isObjectB = isObject(b);
    if (isObjectA && isObjectB) {
        try {
            const isArrayA = Array.isArray(a);
            const isArrayB = Array.isArray(b);
            if (isArrayA && isArrayB) {
                return (a.length === b.length &&
                    a.every((e, i) => {
                        return looseEqual(e, b[i]);
                    }));
            }
            else if (a instanceof Date && b instanceof Date) {
                return a.getTime() === b.getTime();
            }
            else if (!isArrayA && !isArrayB) {
                const keysA = Object.keys(a);
                const keysB = Object.keys(b);
                return (keysA.length === keysB.length &&
                    keysA.every(key => {
                        return looseEqual(a[key], b[key]);
                    }));
            }
            else {
                /* istanbul ignore next */
                return false;
            }
        }
        catch (e) {
            /* istanbul ignore next */
            return false;
        }
    }
    else if (!isObjectA && !isObjectB) {
        return String(a) === String(b);
    }
    else {
        return false;
    }
}
/**
 * Return the first index at which a loosely equal value can be
 * found in the array (if value is a plain object, the array must
 * contain an object of the same shape), or -1 if it is not present.
 */
function looseIndexOf(arr, val) {
    for (let i = 0; i < arr.length; i++) {
        if (looseEqual(arr[i], val))
            return i;
    }
    return -1;
}
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/is#polyfill
function hasChanged(x, y) {
    if (x === y) {
        return x === 0 && 1 / x !== 1 / y;
    }
    else {
        return x === x || y === y;
    }
}

const isUnaryTag = makeMap('area,base,br,col,embed,frame,hr,img,input,isindex,keygen,' +
    'link,meta,param,source,track,wbr');
// Elements that you can, intentionally, leave open
// (and which close themselves)
const canBeLeftOpenTag = makeMap('colgroup,dd,dt,li,options,p,td,tfoot,th,thead,tr,source');
// HTML5 tags https://html.spec.whatwg.org/multipage/indices.html#elements-3
// Phrasing Content https://html.spec.whatwg.org/multipage/dom.html#phrasing-content
const isNonPhrasingTag = makeMap('address,article,aside,base,blockquote,body,caption,col,colgroup,dd,' +
    'details,dialog,div,dl,dt,fieldset,figcaption,figure,footer,form,' +
    'h1,h2,h3,h4,h5,h6,head,header,hgroup,hr,html,legend,li,menuitem,meta,' +
    'optgroup,option,param,rp,rt,source,style,summary,tbody,td,tfoot,th,thead,' +
    'title,tr,track');

/**
 * unicode letters used for parsing html tags, component names and property paths.
 * using https://www.w3.org/TR/html53/semantics-scripting.html#potentialcustomelementname
 * skipping \u10000-\uEFFFF due to it freezing up PhantomJS
 */
const unicodeRegExp = /a-zA-Z\u00B7\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u037D\u037F-\u1FFF\u200C-\u200D\u203F-\u2040\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD/;
/**
 * Define a property.
 */
function def(obj, key, val, enumerable) {
    Object.defineProperty(obj, key, {
        value: val,
        enumerable: !!enumerable,
        writable: true,
        configurable: true
    });
}

/**
 * Not type-checking this file because it's mostly vendor code.
 */
// Regular Expressions for parsing tags and attributes
const attribute = /^\s*([^\s"'<>\/=]+)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
const dynamicArgAttribute = /^\s*((?:v-[\w-]+:|@|:|#)\[[^=]+?\][^\s"'<>\/=]*)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
const ncname = `[a-zA-Z_][\\-\\.0-9_a-zA-Z${unicodeRegExp.source}]*`;
const qnameCapture = `((?:${ncname}\\:)?${ncname})`;
const startTagOpen = new RegExp(`^<${qnameCapture}`);
const startTagClose = /^\s*(\/?)>/;
const endTag = new RegExp(`^<\\/${qnameCapture}[^>]*>`);
const doctype = /^<!DOCTYPE [^>]+>/i;
// #7298: escape - to avoid being passed as HTML comment when inlined in page
const comment = /^<!\--/;
const conditionalComment = /^<!\[/;
// Special Elements (can contain anything)
const isPlainTextElement = makeMap('script,style,textarea', true);
const reCache = {};
const decodingMap = {
    '&lt;': '<',
    '&gt;': '>',
    '&quot;': '"',
    '&amp;': '&',
    '&#10;': '\n',
    '&#9;': '\t',
    '&#39;': "'"
};
const encodedAttr = /&(?:lt|gt|quot|amp|#39);/g;
const encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#39|#10|#9);/g;
// #5992
const isIgnoreNewlineTag = makeMap('pre,textarea', true);
const shouldIgnoreFirstNewline = (tag, html) => tag && isIgnoreNewlineTag(tag) && html[0] === '\n';
function decodeAttr(value, shouldDecodeNewlines) {
    const re = shouldDecodeNewlines ? encodedAttrWithNewLines : encodedAttr;
    return value.replace(re, match => decodingMap[match]);
}
function parseHTML(html, options) {
    const stack = [];
    const expectHTML = options.expectHTML;
    const isUnaryTag = options.isUnaryTag || no;
    const canBeLeftOpenTag = options.canBeLeftOpenTag || no;
    let index = 0;
    let last, lastTag;
    while (html) {
        last = html;
        // Make sure we're not in a plaintext content element like script/style
        if (!lastTag || !isPlainTextElement(lastTag)) {
            let textEnd = html.indexOf('<');
            if (textEnd === 0) {
                // Comment:
                if (comment.test(html)) {
                    const commentEnd = html.indexOf('-->');
                    if (commentEnd >= 0) {
                        if (options.shouldKeepComment && options.comment) {
                            options.comment(html.substring(4, commentEnd), index, index + commentEnd + 3);
                        }
                        advance(commentEnd + 3);
                        continue;
                    }
                }
                // https://en.wikipedia.org/wiki/Conditional_comment#Downlevel-revealed_conditional_comment
                if (conditionalComment.test(html)) {
                    const conditionalEnd = html.indexOf(']>');
                    if (conditionalEnd >= 0) {
                        advance(conditionalEnd + 2);
                        continue;
                    }
                }
                // Doctype:
                const doctypeMatch = html.match(doctype);
                if (doctypeMatch) {
                    advance(doctypeMatch[0].length);
                    continue;
                }
                // End tag:
                const endTagMatch = html.match(endTag);
                if (endTagMatch) {
                    const curIndex = index;
                    advance(endTagMatch[0].length);
                    parseEndTag(endTagMatch[1], curIndex, index);
                    continue;
                }
                // Start tag:
                const startTagMatch = parseStartTag();
                if (startTagMatch) {
                    handleStartTag(startTagMatch);
                    if (shouldIgnoreFirstNewline(startTagMatch.tagName, html)) {
                        advance(1);
                    }
                    continue;
                }
            }
            let text, rest, next;
            if (textEnd >= 0) {
                rest = html.slice(textEnd);
                while (!endTag.test(rest) &&
                    !startTagOpen.test(rest) &&
                    !comment.test(rest) &&
                    !conditionalComment.test(rest)) {
                    // < in plain text, be forgiving and treat it as text
                    next = rest.indexOf('<', 1);
                    if (next < 0)
                        break;
                    textEnd += next;
                    rest = html.slice(textEnd);
                }
                text = html.substring(0, textEnd);
            }
            if (textEnd < 0) {
                text = html;
            }
            if (text) {
                advance(text.length);
            }
            if (options.chars && text) {
                options.chars(text, index - text.length, index);
            }
        }
        else {
            let endTagLength = 0;
            const stackedTag = lastTag.toLowerCase();
            const reStackedTag = reCache[stackedTag] ||
                (reCache[stackedTag] = new RegExp('([\\s\\S]*?)(</' + stackedTag + '[^>]*>)', 'i'));
            const rest = html.replace(reStackedTag, function (all, text, endTag) {
                endTagLength = endTag.length;
                if (!isPlainTextElement(stackedTag) && stackedTag !== 'noscript') {
                    text = text
                        .replace(/<!\--([\s\S]*?)-->/g, '$1') // #7298
                        .replace(/<!\[CDATA\[([\s\S]*?)]]>/g, '$1');
                }
                if (shouldIgnoreFirstNewline(stackedTag, text)) {
                    text = text.slice(1);
                }
                if (options.chars) {
                    options.chars(text);
                }
                return '';
            });
            index += html.length - rest.length;
            html = rest;
            parseEndTag(stackedTag, index - endTagLength, index);
        }
        if (html === last) {
            options.chars && options.chars(html);
            if (process.env.NODE_ENV !== 'production' && !stack.length && options.warn) {
                options.warn(`Mal-formatted tag at end of template: "${html}"`, {
                    start: index + html.length
                });
            }
            break;
        }
    }
    // Clean up any remaining tags
    parseEndTag();
    function advance(n) {
        index += n;
        html = html.substring(n);
    }
    function parseStartTag() {
        const start = html.match(startTagOpen);
        if (start) {
            const match = {
                tagName: start[1],
                attrs: [],
                start: index
            };
            advance(start[0].length);
            let end, attr;
            while (!(end = html.match(startTagClose)) &&
                (attr = html.match(dynamicArgAttribute) || html.match(attribute))) {
                attr.start = index;
                advance(attr[0].length);
                attr.end = index;
                match.attrs.push(attr);
            }
            if (end) {
                match.unarySlash = end[1];
                advance(end[0].length);
                match.end = index;
                return match;
            }
        }
    }
    function handleStartTag(match) {
        const tagName = match.tagName;
        const unarySlash = match.unarySlash;
        if (expectHTML) {
            if (lastTag === 'p' && isNonPhrasingTag(tagName)) {
                parseEndTag(lastTag);
            }
            if (canBeLeftOpenTag(tagName) && lastTag === tagName) {
                parseEndTag(tagName);
            }
        }
        const unary = isUnaryTag(tagName) || !!unarySlash;
        const l = match.attrs.length;
        const attrs = new Array(l);
        for (let i = 0; i < l; i++) {
            const args = match.attrs[i];
            const value = args[3] || args[4] || args[5] || '';
            const shouldDecodeNewlines = tagName === 'a' && args[1] === 'href'
                ? options.shouldDecodeNewlinesForHref
                : options.shouldDecodeNewlines;
            attrs[i] = {
                name: args[1],
                value: decodeAttr(value, shouldDecodeNewlines)
            };
            if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
                attrs[i].start = args.start + args[0].match(/^\s*/).length;
                attrs[i].end = args.end;
            }
        }
        if (!unary) {
            stack.push({
                tag: tagName,
                lowerCasedTag: tagName.toLowerCase(),
                attrs: attrs,
                start: match.start,
                end: match.end
            });
            lastTag = tagName;
        }
        if (options.start) {
            options.start(tagName, attrs, unary, match.start, match.end);
        }
    }
    function parseEndTag(tagName, start, end) {
        let pos, lowerCasedTagName;
        if (start == null)
            start = index;
        if (end == null)
            end = index;
        // Find the closest opened tag of the same type
        if (tagName) {
            lowerCasedTagName = tagName.toLowerCase();
            for (pos = stack.length - 1; pos >= 0; pos--) {
                if (stack[pos].lowerCasedTag === lowerCasedTagName) {
                    break;
                }
            }
        }
        else {
            // If no tag name is provided, clean shop
            pos = 0;
        }
        if (pos >= 0) {
            // Close all the open elements, up the stack
            for (let i = stack.length - 1; i >= pos; i--) {
                if (process.env.NODE_ENV !== 'production' && (i > pos || !tagName) && options.warn) {
                    options.warn(`tag <${stack[i].tag}> has no matching end tag.`, {
                        start: stack[i].start,
                        end: stack[i].end
                    });
                }
                if (options.end) {
                    options.end(stack[i].tag, start, end);
                }
            }
            // Remove the open elements from the stack
            stack.length = pos;
            lastTag = pos && stack[pos - 1].tag;
        }
        else if (lowerCasedTagName === 'br') {
            if (options.start) {
                options.start(tagName, [], true, start, end);
            }
        }
        else if (lowerCasedTagName === 'p') {
            if (options.start) {
                options.start(tagName, [], false, start, end);
            }
            if (options.end) {
                options.end(tagName, start, end);
            }
        }
    }
}

const DEFAULT_FILENAME = 'anonymous.vue';
const splitRE = /\r?\n/g;
const replaceRE = /./g;
const isSpecialTag = makeMap('script,style,template', true);
/**
 * Parse a single-file component (*.vue) file into an SFC Descriptor Object.
 */
function parseComponent(source, options = {}) {
    const sfc = {
        source,
        filename: DEFAULT_FILENAME,
        template: null,
        script: null,
        scriptSetup: null,
        styles: [],
        customBlocks: [],
        cssVars: [],
        errors: [],
        shouldForceReload: null // attached in parse() by compiler-sfc
    };
    let depth = 0;
    let currentBlock = null;
    let warn = msg => {
        sfc.errors.push(msg);
    };
    if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
        warn = (msg, range) => {
            const data = { msg };
            if (range.start != null) {
                data.start = range.start;
            }
            if (range.end != null) {
                data.end = range.end;
            }
            sfc.errors.push(data);
        };
    }
    function start(tag, attrs, unary, start, end) {
        if (depth === 0) {
            currentBlock = {
                type: tag,
                content: '',
                start: end,
                end: 0,
                attrs: attrs.reduce((cumulated, { name, value }) => {
                    cumulated[name] = value || true;
                    return cumulated;
                }, {})
            };
            if (typeof currentBlock.attrs.src === 'string') {
                currentBlock.src = currentBlock.attrs.src;
            }
            if (isSpecialTag(tag)) {
                checkAttrs(currentBlock, attrs);
                if (tag === 'script') {
                    const block = currentBlock;
                    if (block.attrs.setup) {
                        block.setup = currentBlock.attrs.setup;
                        sfc.scriptSetup = block;
                    }
                    else {
                        sfc.script = block;
                    }
                }
                else if (tag === 'style') {
                    sfc.styles.push(currentBlock);
                }
                else {
                    sfc[tag] = currentBlock;
                }
            }
            else {
                // custom blocks
                sfc.customBlocks.push(currentBlock);
            }
        }
        if (!unary) {
            depth++;
        }
    }
    function checkAttrs(block, attrs) {
        for (let i = 0; i < attrs.length; i++) {
            const attr = attrs[i];
            if (attr.name === 'lang') {
                block.lang = attr.value;
            }
            if (attr.name === 'scoped') {
                block.scoped = true;
            }
            if (attr.name === 'module') {
                block.module = attr.value || true;
            }
        }
    }
    function end(tag, start) {
        if (depth === 1 && currentBlock) {
            currentBlock.end = start;
            let text = source.slice(currentBlock.start, currentBlock.end);
            if (options.deindent === true ||
                // by default, deindent unless it's script with default lang or (j/t)sx?
                (options.deindent !== false &&
                    !(currentBlock.type === 'script' &&
                        (!currentBlock.lang || /^(j|t)sx?$/.test(currentBlock.lang))))) {
                text = deindent__default["default"](text);
            }
            // pad content so that linters and pre-processors can output correct
            // line numbers in errors and warnings
            if (currentBlock.type !== 'template' && options.pad) {
                text = padContent(currentBlock, options.pad) + text;
            }
            currentBlock.content = text;
            currentBlock = null;
        }
        depth--;
    }
    function padContent(block, pad) {
        if (pad === 'space') {
            return source.slice(0, block.start).replace(replaceRE, ' ');
        }
        else {
            const offset = source.slice(0, block.start).split(splitRE).length;
            const padChar = block.type === 'script' && !block.lang ? '//\n' : '\n';
            return Array(offset).join(padChar);
        }
    }
    parseHTML(source, {
        warn,
        start,
        end,
        outputSourceRange: options.outputSourceRange
    });
    return sfc;
}

// can we use __proto__?
const hasProto = '__proto__' in {};
// Browser environment sniffing
const inBrowser = typeof window !== 'undefined';
const UA = inBrowser && window.navigator.userAgent.toLowerCase();
const isIE = UA && /msie|trident/.test(UA);
UA && UA.indexOf('msie 9.0') > 0;
const isEdge = UA && UA.indexOf('edge/') > 0;
UA && UA.indexOf('android') > 0;
UA && /iphone|ipad|ipod|ios/.test(UA);
UA && /chrome\/\d+/.test(UA) && !isEdge;
UA && /phantomjs/.test(UA);
UA && UA.match(/firefox\/(\d+)/);
// Firefox has a "watch" function on Object.prototype...
// @ts-expect-error firebox support
const nativeWatch = {}.watch;
let supportsPassive = false;
if (inBrowser) {
    try {
        const opts = {};
        Object.defineProperty(opts, 'passive', {
            get() {
                /* istanbul ignore next */
                supportsPassive = true;
            }
        }); // https://github.com/facebook/flow/issues/285
        window.addEventListener('test-passive', null, opts);
    }
    catch (e) { }
}
// this needs to be lazy-evaled because vue may be required before
// vue-server-renderer can set VUE_ENV
let _isServer;
const isServerRendering = () => {
    if (_isServer === undefined) {
        /* istanbul ignore if */
        if (!inBrowser && typeof global !== 'undefined') {
            // detect presence of vue-server-renderer and avoid
            // Webpack shimming the process
            _isServer =
                global['process'] && global['process'].env.VUE_ENV === 'server';
        }
        else {
            _isServer = false;
        }
    }
    return _isServer;
};
/* istanbul ignore next */
function isNative(Ctor) {
    return typeof Ctor === 'function' && /native code/.test(Ctor.toString());
}
const hasSymbol = typeof Symbol !== 'undefined' &&
    isNative(Symbol) &&
    typeof Reflect !== 'undefined' &&
    isNative(Reflect.ownKeys);
let _Set; // $flow-disable-line
/* istanbul ignore if */ if (typeof Set !== 'undefined' && isNative(Set)) {
    // use native Set when available.
    _Set = Set;
}
else {
    // a non-standard Set polyfill that only works with primitive keys.
    _Set = class Set {
        constructor() {
            this.set = Object.create(null);
        }
        has(key) {
            return this.set[key] === true;
        }
        add(key) {
            this.set[key] = true;
        }
        clear() {
            this.set = Object.create(null);
        }
    };
}

const ASSET_TYPES = ['component', 'directive', 'filter'];
const LIFECYCLE_HOOKS = [
    'beforeCreate',
    'created',
    'beforeMount',
    'mounted',
    'beforeUpdate',
    'updated',
    'beforeDestroy',
    'destroyed',
    'activated',
    'deactivated',
    'errorCaptured',
    'serverPrefetch',
    'renderTracked',
    'renderTriggered'
];

var config = {
    /**
     * Option merge strategies (used in core/util/options)
     */
    // $flow-disable-line
    optionMergeStrategies: Object.create(null),
    /**
     * Whether to suppress warnings.
     */
    silent: false,
    /**
     * Show production mode tip message on boot?
     */
    productionTip: process.env.NODE_ENV !== 'production',
    /**
     * Whether to enable devtools
     */
    devtools: process.env.NODE_ENV !== 'production',
    /**
     * Whether to record perf
     */
    performance: false,
    /**
     * Error handler for watcher errors
     */
    errorHandler: null,
    /**
     * Warn handler for watcher warns
     */
    warnHandler: null,
    /**
     * Ignore certain custom elements
     */
    ignoredElements: [],
    /**
     * Custom user key aliases for v-on
     */
    // $flow-disable-line
    keyCodes: Object.create(null),
    /**
     * Check if a tag is reserved so that it cannot be registered as a
     * component. This is platform-dependent and may be overwritten.
     */
    isReservedTag: no,
    /**
     * Check if an attribute is reserved so that it cannot be used as a component
     * prop. This is platform-dependent and may be overwritten.
     */
    isReservedAttr: no,
    /**
     * Check if a tag is an unknown element.
     * Platform-dependent.
     */
    isUnknownElement: no,
    /**
     * Get the namespace of an element
     */
    getTagNamespace: noop,
    /**
     * Parse the real tag name for the specific platform.
     */
    parsePlatformTagName: identity,
    /**
     * Check if an attribute must be bound using property, e.g. value
     * Platform-dependent.
     */
    mustUseProp: no,
    /**
     * Perform updates asynchronously. Intended to be used by Vue Test Utils
     * This will significantly reduce performance if set to false.
     */
    async: true,
    /**
     * Exposed for legacy reasons
     */
    _lifecycleHooks: LIFECYCLE_HOOKS
};

let currentInstance = null;
/**
 * @internal
 */
function setCurrentInstance(vm = null) {
    if (!vm)
        currentInstance && currentInstance._scope.off();
    currentInstance = vm;
    vm && vm._scope.on();
}

/**
 * @internal
 */
class VNode {
    constructor(tag, data, children, text, elm, context, componentOptions, asyncFactory) {
        this.tag = tag;
        this.data = data;
        this.children = children;
        this.text = text;
        this.elm = elm;
        this.ns = undefined;
        this.context = context;
        this.fnContext = undefined;
        this.fnOptions = undefined;
        this.fnScopeId = undefined;
        this.key = data && data.key;
        this.componentOptions = componentOptions;
        this.componentInstance = undefined;
        this.parent = undefined;
        this.raw = false;
        this.isStatic = false;
        this.isRootInsert = true;
        this.isComment = false;
        this.isCloned = false;
        this.isOnce = false;
        this.asyncFactory = asyncFactory;
        this.asyncMeta = undefined;
        this.isAsyncPlaceholder = false;
    }
    // DEPRECATED: alias for componentInstance for backwards compat.
    /* istanbul ignore next */
    get child() {
        return this.componentInstance;
    }
}
const createEmptyVNode = (text = '') => {
    const node = new VNode();
    node.text = text;
    node.isComment = true;
    return node;
};
function createTextVNode(val) {
    return new VNode(undefined, undefined, undefined, String(val));
}
// optimized shallow clone
// used for static nodes and slot nodes because they may be reused across
// multiple renders, cloning them avoids errors when DOM manipulations rely
// on their elm reference.
function cloneVNode(vnode) {
    const cloned = new VNode(vnode.tag, vnode.data, 
    // #7975
    // clone children array to avoid mutating original in case of cloning
    // a child.
    vnode.children && vnode.children.slice(), vnode.text, vnode.elm, vnode.context, vnode.componentOptions, vnode.asyncFactory);
    cloned.ns = vnode.ns;
    cloned.isStatic = vnode.isStatic;
    cloned.key = vnode.key;
    cloned.isComment = vnode.isComment;
    cloned.fnContext = vnode.fnContext;
    cloned.fnOptions = vnode.fnOptions;
    cloned.fnScopeId = vnode.fnScopeId;
    cloned.asyncMeta = vnode.asyncMeta;
    cloned.isCloned = true;
    return cloned;
}

/* not type checking this file because flow doesn't play well with Proxy */
if (process.env.NODE_ENV !== 'production') {
    makeMap('Infinity,undefined,NaN,isFinite,isNaN,' +
        'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' +
        'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,BigInt,' +
        'require' // for Webpack/Browserify
    );
    const hasProxy = typeof Proxy !== 'undefined' && isNative(Proxy);
    if (hasProxy) {
        const isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');
        config.keyCodes = new Proxy(config.keyCodes, {
            set(target, key, value) {
                if (isBuiltInModifier(key)) {
                    warn$2(`Avoid overwriting built-in modifier in config.keyCodes: .${key}`);
                    return false;
                }
                else {
                    target[key] = value;
                    return true;
                }
            }
        });
    }
}

let uid = 0;
/**
 * A dep is an observable that can have multiple
 * directives subscribing to it.
 * @internal
 */
class Dep {
    constructor() {
        // pending subs cleanup
        this._pending = false;
        this.id = uid++;
        this.subs = [];
    }
    addSub(sub) {
        this.subs.push(sub);
    }
    removeSub(sub) {
        // #12696 deps with massive amount of subscribers are extremely slow to
        // clean up in Chromium
        // to workaround this, we unset the sub for now, and clear them on
        // next scheduler flush.
        this.subs[this.subs.indexOf(sub)] = null;
        if (!this._pending) {
            this._pending = true;
        }
    }
    depend(info) {
        if (Dep.target) {
            Dep.target.addDep(this);
            if (process.env.NODE_ENV !== 'production' && info && Dep.target.onTrack) {
                Dep.target.onTrack(Object.assign({ effect: Dep.target }, info));
            }
        }
    }
    notify(info) {
        // stabilize the subscriber list first
        const subs = this.subs.filter(s => s);
        if (process.env.NODE_ENV !== 'production' && !config.async) {
            // subs aren't sorted in scheduler if not running async
            // we need to sort them now to make sure they fire in correct
            // order
            subs.sort((a, b) => a.id - b.id);
        }
        for (let i = 0, l = subs.length; i < l; i++) {
            const sub = subs[i];
            if (process.env.NODE_ENV !== 'production' && info) {
                sub.onTrigger &&
                    sub.onTrigger(Object.assign({ effect: subs[i] }, info));
            }
            sub.update();
        }
    }
}
// The current target watcher being evaluated.
// This is globally unique because only one watcher
// can be evaluated at a time.
Dep.target = null;
const targetStack = [];
function pushTarget(target) {
    targetStack.push(target);
    Dep.target = target;
}
function popTarget() {
    targetStack.pop();
    Dep.target = targetStack[targetStack.length - 1];
}

/*
 * not type checking this file because flow doesn't play well with
 * dynamically accessing methods on Array prototype
 */
const arrayProto = Array.prototype;
const arrayMethods = Object.create(arrayProto);
const methodsToPatch = [
    'push',
    'pop',
    'shift',
    'unshift',
    'splice',
    'sort',
    'reverse'
];
/**
 * Intercept mutating methods and emit events
 */
methodsToPatch.forEach(function (method) {
    // cache original method
    const original = arrayProto[method];
    def(arrayMethods, method, function mutator(...args) {
        const result = original.apply(this, args);
        const ob = this.__ob__;
        let inserted;
        switch (method) {
            case 'push':
            case 'unshift':
                inserted = args;
                break;
            case 'splice':
                inserted = args.slice(2);
                break;
        }
        if (inserted)
            ob.observeArray(inserted);
        // notify change
        if (process.env.NODE_ENV !== 'production') {
            ob.dep.notify({
                type: "array mutation" /* TriggerOpTypes.ARRAY_MUTATION */,
                target: this,
                key: method
            });
        }
        else {
            ob.dep.notify();
        }
        return result;
    });
});

const arrayKeys = Object.getOwnPropertyNames(arrayMethods);
const NO_INITIAL_VALUE = {};
/**
 * In some cases we may want to disable observation inside a component's
 * update computation.
 */
let shouldObserve = true;
function toggleObserving(value) {
    shouldObserve = value;
}
// ssr mock dep
const mockDep = {
    notify: noop,
    depend: noop,
    addSub: noop,
    removeSub: noop
};
/**
 * Observer class that is attached to each observed
 * object. Once attached, the observer converts the target
 * object's property keys into getter/setters that
 * collect dependencies and dispatch updates.
 */
class Observer {
    constructor(value, shallow = false, mock = false) {
        this.value = value;
        this.shallow = shallow;
        this.mock = mock;
        // this.value = value
        this.dep = mock ? mockDep : new Dep();
        this.vmCount = 0;
        def(value, '__ob__', this);
        if (isArray(value)) {
            if (!mock) {
                if (hasProto) {
                    value.__proto__ = arrayMethods;
                    /* eslint-enable no-proto */
                }
                else {
                    for (let i = 0, l = arrayKeys.length; i < l; i++) {
                        const key = arrayKeys[i];
                        def(value, key, arrayMethods[key]);
                    }
                }
            }
            if (!shallow) {
                this.observeArray(value);
            }
        }
        else {
            /**
             * Walk through all properties and convert them into
             * getter/setters. This method should only be called when
             * value type is Object.
             */
            const keys = Object.keys(value);
            for (let i = 0; i < keys.length; i++) {
                const key = keys[i];
                defineReactive(value, key, NO_INITIAL_VALUE, undefined, shallow, mock);
            }
        }
    }
    /**
     * Observe a list of Array items.
     */
    observeArray(value) {
        for (let i = 0, l = value.length; i < l; i++) {
            observe(value[i], false, this.mock);
        }
    }
}
// helpers
/**
 * Attempt to create an observer instance for a value,
 * returns the new observer if successfully observed,
 * or the existing observer if the value already has one.
 */
function observe(value, shallow, ssrMockReactivity) {
    if (value && hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
        return value.__ob__;
    }
    if (shouldObserve &&
        (ssrMockReactivity || !isServerRendering()) &&
        (isArray(value) || isPlainObject(value)) &&
        Object.isExtensible(value) &&
        !value.__v_skip /* ReactiveFlags.SKIP */ &&
        !isRef(value) &&
        !(value instanceof VNode)) {
        return new Observer(value, shallow, ssrMockReactivity);
    }
}
/**
 * Define a reactive property on an Object.
 */
function defineReactive(obj, key, val, customSetter, shallow, mock, observeEvenIfShallow = false) {
    const dep = new Dep();
    const property = Object.getOwnPropertyDescriptor(obj, key);
    if (property && property.configurable === false) {
        return;
    }
    // cater for pre-defined getter/setters
    const getter = property && property.get;
    const setter = property && property.set;
    if ((!getter || setter) &&
        (val === NO_INITIAL_VALUE || arguments.length === 2)) {
        val = obj[key];
    }
    let childOb = shallow ? val && val.__ob__ : observe(val, false, mock);
    Object.defineProperty(obj, key, {
        enumerable: true,
        configurable: true,
        get: function reactiveGetter() {
            const value = getter ? getter.call(obj) : val;
            if (Dep.target) {
                if (process.env.NODE_ENV !== 'production') {
                    dep.depend({
                        target: obj,
                        type: "get" /* TrackOpTypes.GET */,
                        key
                    });
                }
                else {
                    dep.depend();
                }
                if (childOb) {
                    childOb.dep.depend();
                    if (isArray(value)) {
                        dependArray(value);
                    }
                }
            }
            return isRef(value) && !shallow ? value.value : value;
        },
        set: function reactiveSetter(newVal) {
            const value = getter ? getter.call(obj) : val;
            if (!hasChanged(value, newVal)) {
                return;
            }
            if (process.env.NODE_ENV !== 'production' && customSetter) {
                customSetter();
            }
            if (setter) {
                setter.call(obj, newVal);
            }
            else if (getter) {
                // #7981: for accessor properties without setter
                return;
            }
            else if (!shallow && isRef(value) && !isRef(newVal)) {
                value.value = newVal;
                return;
            }
            else {
                val = newVal;
            }
            childOb = shallow ? newVal && newVal.__ob__ : observe(newVal, false, mock);
            if (process.env.NODE_ENV !== 'production') {
                dep.notify({
                    type: "set" /* TriggerOpTypes.SET */,
                    target: obj,
                    key,
                    newValue: newVal,
                    oldValue: value
                });
            }
            else {
                dep.notify();
            }
        }
    });
    return dep;
}
function set(target, key, val) {
    if (process.env.NODE_ENV !== 'production' && (isUndef(target) || isPrimitive(target))) {
        warn$2(`Cannot set reactive property on undefined, null, or primitive value: ${target}`);
    }
    if (isReadonly(target)) {
        process.env.NODE_ENV !== 'production' && warn$2(`Set operation on key "${key}" failed: target is readonly.`);
        return;
    }
    const ob = target.__ob__;
    if (isArray(target) && isValidArrayIndex(key)) {
        target.length = Math.max(target.length, key);
        target.splice(key, 1, val);
        // when mocking for SSR, array methods are not hijacked
        if (ob && !ob.shallow && ob.mock) {
            observe(val, false, true);
        }
        return val;
    }
    if (key in target && !(key in Object.prototype)) {
        target[key] = val;
        return val;
    }
    if (target._isVue || (ob && ob.vmCount)) {
        process.env.NODE_ENV !== 'production' &&
            warn$2('Avoid adding reactive properties to a Vue instance or its root $data ' +
                'at runtime - declare it upfront in the data option.');
        return val;
    }
    if (!ob) {
        target[key] = val;
        return val;
    }
    defineReactive(ob.value, key, val, undefined, ob.shallow, ob.mock);
    if (process.env.NODE_ENV !== 'production') {
        ob.dep.notify({
            type: "add" /* TriggerOpTypes.ADD */,
            target: target,
            key,
            newValue: val,
            oldValue: undefined
        });
    }
    else {
        ob.dep.notify();
    }
    return val;
}
/**
 * Collect dependencies on array elements when the array is touched, since
 * we cannot intercept array element access like property getters.
 */
function dependArray(value) {
    for (let e, i = 0, l = value.length; i < l; i++) {
        e = value[i];
        if (e && e.__ob__) {
            e.__ob__.dep.depend();
        }
        if (isArray(e)) {
            dependArray(e);
        }
    }
}

function isReadonly(value) {
    return !!(value && value.__v_isReadonly);
}

function isRef(r) {
    return !!(r && r.__v_isRef === true);
}

if (process.env.NODE_ENV !== 'production') ;

const normalizeEvent = cached((name) => {
    const passive = name.charAt(0) === '&';
    name = passive ? name.slice(1) : name;
    const once = name.charAt(0) === '~'; // Prefixed last, checked first
    name = once ? name.slice(1) : name;
    const capture = name.charAt(0) === '!';
    name = capture ? name.slice(1) : name;
    return {
        name,
        once,
        capture,
        passive
    };
});
function createFnInvoker(fns, vm) {
    function invoker() {
        const fns = invoker.fns;
        if (isArray(fns)) {
            const cloned = fns.slice();
            for (let i = 0; i < cloned.length; i++) {
                invokeWithErrorHandling(cloned[i], null, arguments, vm, `v-on handler`);
            }
        }
        else {
            // return handler return value for single handlers
            return invokeWithErrorHandling(fns, null, arguments, vm, `v-on handler`);
        }
    }
    invoker.fns = fns;
    return invoker;
}
function updateListeners(on, oldOn, add, remove, createOnceHandler, vm) {
    let name, cur, old, event;
    for (name in on) {
        cur = on[name];
        old = oldOn[name];
        event = normalizeEvent(name);
        if (isUndef(cur)) {
            process.env.NODE_ENV !== 'production' &&
                warn$2(`Invalid handler for event "${event.name}": got ` + String(cur), vm);
        }
        else if (isUndef(old)) {
            if (isUndef(cur.fns)) {
                cur = on[name] = createFnInvoker(cur, vm);
            }
            if (isTrue(event.once)) {
                cur = on[name] = createOnceHandler(event.name, cur, event.capture);
            }
            add(event.name, cur, event.capture, event.passive, event.params);
        }
        else if (cur !== old) {
            old.fns = cur;
            on[name] = old;
        }
    }
    for (name in oldOn) {
        if (isUndef(on[name])) {
            event = normalizeEvent(name);
            remove(event.name, oldOn[name], event.capture);
        }
    }
}

function extractPropsFromVNodeData(data, Ctor, tag) {
    // we are only extracting raw values here.
    // validation and default values are handled in the child
    // component itself.
    const propOptions = Ctor.options.props;
    if (isUndef(propOptions)) {
        return;
    }
    const res = {};
    const { attrs, props } = data;
    if (isDef(attrs) || isDef(props)) {
        for (const key in propOptions) {
            const altKey = hyphenate(key);
            if (process.env.NODE_ENV !== 'production') {
                const keyInLowerCase = key.toLowerCase();
                if (key !== keyInLowerCase && attrs && hasOwn(attrs, keyInLowerCase)) {
                    tip(`Prop "${keyInLowerCase}" is passed to component ` +
                        `${formatComponentName(
                        // @ts-expect-error tag is string
                        tag || Ctor)}, but the declared prop name is` +
                        ` "${key}". ` +
                        `Note that HTML attributes are case-insensitive and camelCased ` +
                        `props need to use their kebab-case equivalents when using in-DOM ` +
                        `templates. You should probably use "${altKey}" instead of "${key}".`);
                }
            }
            checkProp(res, props, key, altKey, true) ||
                checkProp(res, attrs, key, altKey, false);
        }
    }
    return res;
}
function checkProp(res, hash, key, altKey, preserve) {
    if (isDef(hash)) {
        if (hasOwn(hash, key)) {
            res[key] = hash[key];
            if (!preserve) {
                delete hash[key];
            }
            return true;
        }
        else if (hasOwn(hash, altKey)) {
            res[key] = hash[altKey];
            if (!preserve) {
                delete hash[altKey];
            }
            return true;
        }
    }
    return false;
}

// The template compiler attempts to minimize the need for normalization by
// statically analyzing the template at compile time.
//
// For plain HTML markup, normalization can be completely skipped because the
// generated render function is guaranteed to return Array<VNode>. There are
// two cases where extra normalization is needed:
// 1. When the children contains components - because a functional component
// may return an Array instead of a single root. In this case, just a simple
// normalization is needed - if any child is an Array, we flatten the whole
// thing with Array.prototype.concat. It is guaranteed to be only 1-level deep
// because functional components already normalize their own children.
function simpleNormalizeChildren(children) {
    for (let i = 0; i < children.length; i++) {
        if (isArray(children[i])) {
            return Array.prototype.concat.apply([], children);
        }
    }
    return children;
}
// 2. When the children contains constructs that always generated nested Arrays,
// e.g. <template>, <slot>, v-for, or when the children is provided by user
// with hand-written render functions / JSX. In such cases a full normalization
// is needed to cater to all possible types of children values.
function normalizeChildren(children) {
    return isPrimitive(children)
        ? [createTextVNode(children)]
        : isArray(children)
            ? normalizeArrayChildren(children)
            : undefined;
}
function isTextNode(node) {
    return isDef(node) && isDef(node.text) && isFalse(node.isComment);
}
function normalizeArrayChildren(children, nestedIndex) {
    const res = [];
    let i, c, lastIndex, last;
    for (i = 0; i < children.length; i++) {
        c = children[i];
        if (isUndef(c) || typeof c === 'boolean')
            continue;
        lastIndex = res.length - 1;
        last = res[lastIndex];
        //  nested
        if (isArray(c)) {
            if (c.length > 0) {
                c = normalizeArrayChildren(c, `${nestedIndex || ''}_${i}`);
                // merge adjacent text nodes
                if (isTextNode(c[0]) && isTextNode(last)) {
                    res[lastIndex] = createTextVNode(last.text + c[0].text);
                    c.shift();
                }
                res.push.apply(res, c);
            }
        }
        else if (isPrimitive(c)) {
            if (isTextNode(last)) {
                // merge adjacent text nodes
                // this is necessary for SSR hydration because text nodes are
                // essentially merged when rendered to HTML strings
                res[lastIndex] = createTextVNode(last.text + c);
            }
            else if (c !== '') {
                // convert primitive to vnode
                res.push(createTextVNode(c));
            }
        }
        else {
            if (isTextNode(c) && isTextNode(last)) {
                // merge adjacent text nodes
                res[lastIndex] = createTextVNode(last.text + c.text);
            }
            else {
                // default key for nested array children (likely generated by v-for)
                if (isTrue(children._isVList) &&
                    isDef(c.tag) &&
                    isUndef(c.key) &&
                    isDef(nestedIndex)) {
                    c.key = `__vlist${nestedIndex}_${i}__`;
                }
                res.push(c);
            }
        }
    }
    return res;
}

const SIMPLE_NORMALIZE = 1;
const ALWAYS_NORMALIZE = 2;
// wrapper function for providing a more flexible interface
// without getting yelled at by flow
function createElement(context, tag, data, children, normalizationType, alwaysNormalize) {
    if (isArray(data) || isPrimitive(data)) {
        normalizationType = children;
        children = data;
        data = undefined;
    }
    if (isTrue(alwaysNormalize)) {
        normalizationType = ALWAYS_NORMALIZE;
    }
    return _createElement(context, tag, data, children, normalizationType);
}
function _createElement(context, tag, data, children, normalizationType) {
    if (isDef(data) && isDef(data.__ob__)) {
        process.env.NODE_ENV !== 'production' &&
            warn$2(`Avoid using observed data object as vnode data: ${JSON.stringify(data)}\n` + 'Always create fresh vnode data objects in each render!', context);
        return createEmptyVNode();
    }
    // object syntax in v-bind
    if (isDef(data) && isDef(data.is)) {
        tag = data.is;
    }
    if (!tag) {
        // in case of component :is set to falsy value
        return createEmptyVNode();
    }
    // warn against non-primitive key
    if (process.env.NODE_ENV !== 'production' && isDef(data) && isDef(data.key) && !isPrimitive(data.key)) {
        warn$2('Avoid using non-primitive value as key, ' +
            'use string/number value instead.', context);
    }
    // support single function children as default scoped slot
    if (isArray(children) && isFunction(children[0])) {
        data = data || {};
        data.scopedSlots = { default: children[0] };
        children.length = 0;
    }
    if (normalizationType === ALWAYS_NORMALIZE) {
        children = normalizeChildren(children);
    }
    else if (normalizationType === SIMPLE_NORMALIZE) {
        children = simpleNormalizeChildren(children);
    }
    let vnode, ns;
    if (typeof tag === 'string') {
        let Ctor;
        ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
        if ((!data || !data.pre) &&
            isDef((Ctor = resolveAsset(context.$options, 'components', tag)))) {
            // component
            vnode = createComponent(Ctor, data, context, children, tag);
        }
        else {
            // unknown or unlisted namespaced elements
            // check at runtime because it may get assigned a namespace when its
            // parent normalizes children
            vnode = new VNode(tag, data, children, undefined, undefined, context);
        }
    }
    else {
        // direct component options / constructor
        vnode = createComponent(tag, data, context, children);
    }
    if (isArray(vnode)) {
        return vnode;
    }
    else if (isDef(vnode)) {
        if (isDef(ns))
            applyNS(vnode, ns);
        if (isDef(data))
            registerDeepBindings(data);
        return vnode;
    }
    else {
        return createEmptyVNode();
    }
}
function applyNS(vnode, ns, force) {
    vnode.ns = ns;
    if (vnode.tag === 'foreignObject') {
        // use default namespace inside foreignObject
        ns = undefined;
        force = true;
    }
    if (isDef(vnode.children)) {
        for (let i = 0, l = vnode.children.length; i < l; i++) {
            const child = vnode.children[i];
            if (isDef(child.tag) &&
                (isUndef(child.ns) || (isTrue(force) && child.tag !== 'svg'))) {
                applyNS(child, ns, force);
            }
        }
    }
}
// ref #5318
// necessary to ensure parent re-render when deep bindings like :style and
// :class are used on slot nodes
function registerDeepBindings(data) {
    if (isObject(data.style)) {
        traverse(data.style);
    }
    if (isObject(data.class)) {
        traverse(data.class);
    }
}

/**
 * Runtime helper for rendering v-for lists.
 */
function renderList(val, render) {
    let ret = null, i, l, keys, key;
    if (isArray(val) || typeof val === 'string') {
        ret = new Array(val.length);
        for (i = 0, l = val.length; i < l; i++) {
            ret[i] = render(val[i], i);
        }
    }
    else if (typeof val === 'number') {
        ret = new Array(val);
        for (i = 0; i < val; i++) {
            ret[i] = render(i + 1, i);
        }
    }
    else if (isObject(val)) {
        if (hasSymbol && val[Symbol.iterator]) {
            ret = [];
            const iterator = val[Symbol.iterator]();
            let result = iterator.next();
            while (!result.done) {
                ret.push(render(result.value, ret.length));
                result = iterator.next();
            }
        }
        else {
            keys = Object.keys(val);
            ret = new Array(keys.length);
            for (i = 0, l = keys.length; i < l; i++) {
                key = keys[i];
                ret[i] = render(val[key], key, i);
            }
        }
    }
    if (!isDef(ret)) {
        ret = [];
    }
    ret._isVList = true;
    return ret;
}

/**
 * Runtime helper for rendering <slot>
 */
function renderSlot(name, fallbackRender, props, bindObject) {
    const scopedSlotFn = this.$scopedSlots[name];
    let nodes;
    if (scopedSlotFn) {
        // scoped slot
        props = props || {};
        if (bindObject) {
            if (process.env.NODE_ENV !== 'production' && !isObject(bindObject)) {
                warn$2('slot v-bind without argument expects an Object', this);
            }
            props = extend(extend({}, bindObject), props);
        }
        nodes =
            scopedSlotFn(props) ||
                (isFunction(fallbackRender) ? fallbackRender() : fallbackRender);
    }
    else {
        nodes =
            this.$slots[name] ||
                (isFunction(fallbackRender) ? fallbackRender() : fallbackRender);
    }
    const target = props && props.slot;
    if (target) {
        return this.$createElement('template', { slot: target }, nodes);
    }
    else {
        return nodes;
    }
}

/**
 * Runtime helper for resolving filters
 */
function resolveFilter(id) {
    return resolveAsset(this.$options, 'filters', id, true) || identity;
}

function isKeyNotMatch(expect, actual) {
    if (isArray(expect)) {
        return expect.indexOf(actual) === -1;
    }
    else {
        return expect !== actual;
    }
}
/**
 * Runtime helper for checking keyCodes from config.
 * exposed as Vue.prototype._k
 * passing in eventKeyName as last argument separately for backwards compat
 */
function checkKeyCodes(eventKeyCode, key, builtInKeyCode, eventKeyName, builtInKeyName) {
    const mappedKeyCode = config.keyCodes[key] || builtInKeyCode;
    if (builtInKeyName && eventKeyName && !config.keyCodes[key]) {
        return isKeyNotMatch(builtInKeyName, eventKeyName);
    }
    else if (mappedKeyCode) {
        return isKeyNotMatch(mappedKeyCode, eventKeyCode);
    }
    else if (eventKeyName) {
        return hyphenate(eventKeyName) !== key;
    }
    return eventKeyCode === undefined;
}

/**
 * Runtime helper for merging v-bind="object" into a VNode's data.
 */
function bindObjectProps(data, tag, value, asProp, isSync) {
    if (value) {
        if (!isObject(value)) {
            process.env.NODE_ENV !== 'production' &&
                warn$2('v-bind without argument expects an Object or Array value', this);
        }
        else {
            if (isArray(value)) {
                value = toObject(value);
            }
            let hash;
            for (const key in value) {
                if (key === 'class' || key === 'style' || isReservedAttribute(key)) {
                    hash = data;
                }
                else {
                    const type = data.attrs && data.attrs.type;
                    hash =
                        asProp || config.mustUseProp(tag, type, key)
                            ? data.domProps || (data.domProps = {})
                            : data.attrs || (data.attrs = {});
                }
                const camelizedKey = camelize(key);
                const hyphenatedKey = hyphenate(key);
                if (!(camelizedKey in hash) && !(hyphenatedKey in hash)) {
                    hash[key] = value[key];
                    if (isSync) {
                        const on = data.on || (data.on = {});
                        on[`update:${key}`] = function ($event) {
                            value[key] = $event;
                        };
                    }
                }
            }
        }
    }
    return data;
}

/**
 * Runtime helper for rendering static trees.
 */
function renderStatic(index, isInFor) {
    const cached = this._staticTrees || (this._staticTrees = []);
    let tree = cached[index];
    // if has already-rendered static tree and not inside v-for,
    // we can reuse the same tree.
    if (tree && !isInFor) {
        return tree;
    }
    // otherwise, render a fresh tree.
    tree = cached[index] = this.$options.staticRenderFns[index].call(this._renderProxy, this._c, this // for render fns generated for functional component templates
    );
    markStatic$1(tree, `__static__${index}`, false);
    return tree;
}
/**
 * Runtime helper for v-once.
 * Effectively it means marking the node as static with a unique key.
 */
function markOnce(tree, index, key) {
    markStatic$1(tree, `__once__${index}${key ? `_${key}` : ``}`, true);
    return tree;
}
function markStatic$1(tree, key, isOnce) {
    if (isArray(tree)) {
        for (let i = 0; i < tree.length; i++) {
            if (tree[i] && typeof tree[i] !== 'string') {
                markStaticNode(tree[i], `${key}_${i}`, isOnce);
            }
        }
    }
    else {
        markStaticNode(tree, key, isOnce);
    }
}
function markStaticNode(node, key, isOnce) {
    node.isStatic = true;
    node.key = key;
    node.isOnce = isOnce;
}

function bindObjectListeners(data, value) {
    if (value) {
        if (!isPlainObject(value)) {
            process.env.NODE_ENV !== 'production' && warn$2('v-on without argument expects an Object value', this);
        }
        else {
            const on = (data.on = data.on ? extend({}, data.on) : {});
            for (const key in value) {
                const existing = on[key];
                const ours = value[key];
                on[key] = existing ? [].concat(existing, ours) : ours;
            }
        }
    }
    return data;
}

function resolveScopedSlots(fns, res, 
// the following are added in 2.6
hasDynamicKeys, contentHashKey) {
    res = res || { $stable: !hasDynamicKeys };
    for (let i = 0; i < fns.length; i++) {
        const slot = fns[i];
        if (isArray(slot)) {
            resolveScopedSlots(slot, res, hasDynamicKeys);
        }
        else if (slot) {
            // marker for reverse proxying v-slot without scope on this.$slots
            // @ts-expect-error
            if (slot.proxy) {
                // @ts-expect-error
                slot.fn.proxy = true;
            }
            res[slot.key] = slot.fn;
        }
    }
    if (contentHashKey) {
        res.$key = contentHashKey;
    }
    return res;
}

// helper to process dynamic keys for dynamic arguments in v-bind and v-on.
function bindDynamicKeys(baseObj, values) {
    for (let i = 0; i < values.length; i += 2) {
        const key = values[i];
        if (typeof key === 'string' && key) {
            baseObj[values[i]] = values[i + 1];
        }
        else if (process.env.NODE_ENV !== 'production' && key !== '' && key !== null) {
            // null is a special value for explicitly removing a binding
            warn$2(`Invalid value for dynamic directive argument (expected string or null): ${key}`, this);
        }
    }
    return baseObj;
}
// helper to dynamically append modifier runtime markers to event names.
// ensure only append when value is already string, otherwise it will be cast
// to string and cause the type check to miss.
function prependModifier(value, symbol) {
    return typeof value === 'string' ? symbol + value : value;
}

function installRenderHelpers(target) {
    target._o = markOnce;
    target._n = toNumber;
    target._s = toString;
    target._l = renderList;
    target._t = renderSlot;
    target._q = looseEqual;
    target._i = looseIndexOf;
    target._m = renderStatic;
    target._f = resolveFilter;
    target._k = checkKeyCodes;
    target._b = bindObjectProps;
    target._v = createTextVNode;
    target._e = createEmptyVNode;
    target._u = resolveScopedSlots;
    target._g = bindObjectListeners;
    target._d = bindDynamicKeys;
    target._p = prependModifier;
}

/**
 * Runtime helper for resolving raw children VNodes into a slot object.
 */
function resolveSlots(children, context) {
    if (!children || !children.length) {
        return {};
    }
    const slots = {};
    for (let i = 0, l = children.length; i < l; i++) {
        const child = children[i];
        const data = child.data;
        // remove slot attribute if the node is resolved as a Vue slot node
        if (data && data.attrs && data.attrs.slot) {
            delete data.attrs.slot;
        }
        // named slots should only be respected if the vnode was rendered in the
        // same context.
        if ((child.context === context || child.fnContext === context) &&
            data &&
            data.slot != null) {
            const name = data.slot;
            const slot = slots[name] || (slots[name] = []);
            if (child.tag === 'template') {
                slot.push.apply(slot, child.children || []);
            }
            else {
                slot.push(child);
            }
        }
        else {
            (slots.default || (slots.default = [])).push(child);
        }
    }
    // ignore slots that contains only whitespace
    for (const name in slots) {
        if (slots[name].every(isWhitespace)) {
            delete slots[name];
        }
    }
    return slots;
}
function isWhitespace(node) {
    return (node.isComment && !node.asyncFactory) || node.text === ' ';
}

function isAsyncPlaceholder(node) {
    // @ts-expect-error not really boolean type
    return node.isComment && node.asyncFactory;
}

function normalizeScopedSlots(ownerVm, scopedSlots, normalSlots, prevScopedSlots) {
    let res;
    const hasNormalSlots = Object.keys(normalSlots).length > 0;
    const isStable = scopedSlots ? !!scopedSlots.$stable : !hasNormalSlots;
    const key = scopedSlots && scopedSlots.$key;
    if (!scopedSlots) {
        res = {};
    }
    else if (scopedSlots._normalized) {
        // fast path 1: child component re-render only, parent did not change
        return scopedSlots._normalized;
    }
    else if (isStable &&
        prevScopedSlots &&
        prevScopedSlots !== emptyObject &&
        key === prevScopedSlots.$key &&
        !hasNormalSlots &&
        !prevScopedSlots.$hasNormal) {
        // fast path 2: stable scoped slots w/ no normal slots to proxy,
        // only need to normalize once
        return prevScopedSlots;
    }
    else {
        res = {};
        for (const key in scopedSlots) {
            if (scopedSlots[key] && key[0] !== '$') {
                res[key] = normalizeScopedSlot(ownerVm, normalSlots, key, scopedSlots[key]);
            }
        }
    }
    // expose normal slots on scopedSlots
    for (const key in normalSlots) {
        if (!(key in res)) {
            res[key] = proxyNormalSlot(normalSlots, key);
        }
    }
    // avoriaz seems to mock a non-extensible $scopedSlots object
    // and when that is passed down this would cause an error
    if (scopedSlots && Object.isExtensible(scopedSlots)) {
        scopedSlots._normalized = res;
    }
    def(res, '$stable', isStable);
    def(res, '$key', key);
    def(res, '$hasNormal', hasNormalSlots);
    return res;
}
function normalizeScopedSlot(vm, normalSlots, key, fn) {
    const normalized = function () {
        const cur = currentInstance;
        setCurrentInstance(vm);
        let res = arguments.length ? fn.apply(null, arguments) : fn({});
        res =
            res && typeof res === 'object' && !isArray(res)
                ? [res] // single vnode
                : normalizeChildren(res);
        const vnode = res && res[0];
        setCurrentInstance(cur);
        return res &&
            (!vnode ||
                (res.length === 1 && vnode.isComment && !isAsyncPlaceholder(vnode))) // #9658, #10391
            ? undefined
            : res;
    };
    // this is a slot using the new v-slot syntax without scope. although it is
    // compiled as a scoped slot, render fn users would expect it to be present
    // on this.$slots because the usage is semantically a normal slot.
    if (fn.proxy) {
        Object.defineProperty(normalSlots, key, {
            get: normalized,
            enumerable: true,
            configurable: true
        });
    }
    return normalized;
}
function proxyNormalSlot(slots, key) {
    return () => slots[key];
}

function syncSetupProxy(to, from, prev, instance, type) {
    let changed = false;
    for (const key in from) {
        if (!(key in to)) {
            changed = true;
            defineProxyAttr(to, key, instance, type);
        }
        else if (from[key] !== prev[key]) {
            changed = true;
        }
    }
    for (const key in to) {
        if (!(key in from)) {
            changed = true;
            delete to[key];
        }
    }
    return changed;
}
function defineProxyAttr(proxy, key, instance, type) {
    Object.defineProperty(proxy, key, {
        enumerable: true,
        configurable: true,
        get() {
            return instance[type][key];
        }
    });
}

function createAsyncPlaceholder(factory, data, context, children, tag) {
    const node = createEmptyVNode();
    node.asyncFactory = factory;
    node.asyncMeta = { data, context, children, tag };
    return node;
}
function resolveAsyncComponent(factory, baseCtor) {
    if (isTrue(factory.error) && isDef(factory.errorComp)) {
        return factory.errorComp;
    }
    if (isDef(factory.resolved)) {
        return factory.resolved;
    }
    if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
        return factory.loadingComp;
    }
}

let target;
function add(event, fn) {
    target.$on(event, fn);
}
function remove(event, fn) {
    target.$off(event, fn);
}
function createOnceHandler(event, fn) {
    const _target = target;
    return function onceHandler() {
        const res = fn.apply(null, arguments);
        if (res !== null) {
            _target.$off(event, onceHandler);
        }
    };
}
function updateComponentListeners(vm, listeners, oldListeners) {
    target = vm;
    updateListeners(listeners, oldListeners || {}, add, remove, createOnceHandler, vm);
    target = undefined;
}

let activeInstance = null;
function updateChildComponent(vm, propsData, listeners, parentVnode, renderChildren) {
    if (process.env.NODE_ENV !== 'production') ;
    // determine whether component has slot children
    // we need to do this before overwriting $options._renderChildren.
    // check if there are dynamic scopedSlots (hand-written or compiled but with
    // dynamic slot names). Static scoped slots compiled from template has the
    // "$stable" marker.
    const newScopedSlots = parentVnode.data.scopedSlots;
    const oldScopedSlots = vm.$scopedSlots;
    const hasDynamicScopedSlot = !!((newScopedSlots && !newScopedSlots.$stable) ||
        (oldScopedSlots !== emptyObject && !oldScopedSlots.$stable) ||
        (newScopedSlots && vm.$scopedSlots.$key !== newScopedSlots.$key) ||
        (!newScopedSlots && vm.$scopedSlots.$key));
    // Any static slot children from the parent may have changed during parent's
    // update. Dynamic scoped slots may also have changed. In such cases, a forced
    // update is necessary to ensure correctness.
    let needsForceUpdate = !!(renderChildren || // has new static slots
        vm.$options._renderChildren || // has old static slots
        hasDynamicScopedSlot);
    const prevVNode = vm.$vnode;
    vm.$options._parentVnode = parentVnode;
    vm.$vnode = parentVnode; // update vm's placeholder node without re-render
    if (vm._vnode) {
        // update child tree's parent
        vm._vnode.parent = parentVnode;
    }
    vm.$options._renderChildren = renderChildren;
    // update $attrs and $listeners hash
    // these are also reactive so they may trigger child update if the child
    // used them during render
    const attrs = parentVnode.data.attrs || emptyObject;
    if (vm._attrsProxy) {
        // force update if attrs are accessed and has changed since it may be
        // passed to a child component.
        if (syncSetupProxy(vm._attrsProxy, attrs, (prevVNode.data && prevVNode.data.attrs) || emptyObject, vm, '$attrs')) {
            needsForceUpdate = true;
        }
    }
    vm.$attrs = attrs;
    // update listeners
    listeners = listeners || emptyObject;
    const prevListeners = vm.$options._parentListeners;
    if (vm._listenersProxy) {
        syncSetupProxy(vm._listenersProxy, listeners, prevListeners || emptyObject, vm, '$listeners');
    }
    vm.$listeners = vm.$options._parentListeners = listeners;
    updateComponentListeners(vm, listeners, prevListeners);
    // update props
    if (propsData && vm.$options.props) {
        toggleObserving(false);
        const props = vm._props;
        const propKeys = vm.$options._propKeys || [];
        for (let i = 0; i < propKeys.length; i++) {
            const key = propKeys[i];
            const propOptions = vm.$options.props; // wtf flow?
            props[key] = validateProp(key, propOptions, propsData, vm);
        }
        toggleObserving(true);
        // keep a copy of raw propsData
        vm.$options.propsData = propsData;
    }
    // resolve slots + force update if has children
    if (needsForceUpdate) {
        vm.$slots = resolveSlots(renderChildren, parentVnode.context);
        vm.$forceUpdate();
    }
    if (process.env.NODE_ENV !== 'production') ;
}
function isInInactiveTree(vm) {
    while (vm && (vm = vm.$parent)) {
        if (vm._inactive)
            return true;
    }
    return false;
}
function activateChildComponent(vm, direct) {
    if (direct) {
        vm._directInactive = false;
        if (isInInactiveTree(vm)) {
            return;
        }
    }
    else if (vm._directInactive) {
        return;
    }
    if (vm._inactive || vm._inactive === null) {
        vm._inactive = false;
        for (let i = 0; i < vm.$children.length; i++) {
            activateChildComponent(vm.$children[i]);
        }
        callHook(vm, 'activated');
    }
}
function deactivateChildComponent(vm, direct) {
    if (direct) {
        vm._directInactive = true;
        if (isInInactiveTree(vm)) {
            return;
        }
    }
    if (!vm._inactive) {
        vm._inactive = true;
        for (let i = 0; i < vm.$children.length; i++) {
            deactivateChildComponent(vm.$children[i]);
        }
        callHook(vm, 'deactivated');
    }
}
function callHook(vm, hook, args, setContext = true) {
    // #7573 disable dep collection when invoking lifecycle hooks
    pushTarget();
    const prevInst = currentInstance;
    setContext && setCurrentInstance(vm);
    const handlers = vm.$options[hook];
    const info = `${hook} hook`;
    if (handlers) {
        for (let i = 0, j = handlers.length; i < j; i++) {
            invokeWithErrorHandling(handlers[i], vm, args || null, vm, info);
        }
    }
    if (vm._hasHookEvent) {
        vm.$emit('hook:' + hook);
    }
    if (setContext) {
        setCurrentInstance(prevInst);
    }
    popTarget();
}

// Async edge case fix requires storing an event listener's attach timestamp.
let getNow = Date.now;
// Determine what event timestamp the browser is using. Annoyingly, the
// timestamp can either be hi-res (relative to page load) or low-res
// (relative to UNIX epoch), so in order to compare time we have to use the
// same timestamp type when saving the flush timestamp.
// All IE versions use low-res event timestamps, and have problematic clock
// implementations (#9632)
if (inBrowser && !isIE) {
    const performance = window.performance;
    if (performance &&
        typeof performance.now === 'function' &&
        getNow() > document.createEvent('Event').timeStamp) {
        // if the event timestamp, although evaluated AFTER the Date.now(), is
        // smaller than it, it means the event is using a hi-res timestamp,
        // and we need to use the hi-res version for event listener timestamps as
        // well.
        getNow = () => performance.now();
    }
}
/**
 * Queue a kept-alive component that was activated during patch.
 * The queue will be processed after the entire tree has been patched.
 */
function queueActivatedComponent(vm) {
    // setting _inactive to false here so that a render function can
    // rely on checking whether it's in an inactive tree (e.g. router-view)
    vm._inactive = false;
}

function handleError(err, vm, info) {
    // Deactivate deps tracking while processing error handler to avoid possible infinite rendering.
    // See: https://github.com/vuejs/vuex/issues/1505
    pushTarget();
    try {
        if (vm) {
            let cur = vm;
            while ((cur = cur.$parent)) {
                const hooks = cur.$options.errorCaptured;
                if (hooks) {
                    for (let i = 0; i < hooks.length; i++) {
                        try {
                            const capture = hooks[i].call(cur, err, vm, info) === false;
                            if (capture)
                                return;
                        }
                        catch (e) {
                            globalHandleError(e, cur, 'errorCaptured hook');
                        }
                    }
                }
            }
        }
        globalHandleError(err, vm, info);
    }
    finally {
        popTarget();
    }
}
function invokeWithErrorHandling(handler, context, args, vm, info) {
    let res;
    try {
        res = args ? handler.apply(context, args) : handler.call(context);
        if (res && !res._isVue && isPromise(res) && !res._handled) {
            res.catch(e => handleError(e, vm, info + ` (Promise/async)`));
            res._handled = true;
        }
    }
    catch (e) {
        handleError(e, vm, info);
    }
    return res;
}
function globalHandleError(err, vm, info) {
    logError(err, vm, info);
}
function logError(err, vm, info) {
    if (process.env.NODE_ENV !== 'production') {
        warn$2(`Error in ${info}: "${err.toString()}"`, vm);
    }
    /* istanbul ignore else */
    if (inBrowser && typeof console !== 'undefined') {
        console.error(err);
    }
    else {
        throw err;
    }
}

/* globals MutationObserver */
const callbacks = [];
function flushCallbacks() {
    const copies = callbacks.slice(0);
    callbacks.length = 0;
    for (let i = 0; i < copies.length; i++) {
        copies[i]();
    }
}
// The nextTick behavior leverages the microtask queue, which can be accessed
// via either native Promise.then or MutationObserver.
// MutationObserver has wider support, however it is seriously bugged in
// UIWebView in iOS >= 9.3.3 when triggered in touch event handlers. It
// completely stops working after triggering a few times... so, if native
// Promise is available, we will use it:
/* istanbul ignore next, $flow-disable-line */
if (typeof Promise !== 'undefined' && isNative(Promise)) {
    Promise.resolve();
}
else if (!isIE &&
    typeof MutationObserver !== 'undefined' &&
    (isNative(MutationObserver) ||
        // PhantomJS and iOS 7.x
        MutationObserver.toString() === '[object MutationObserverConstructor]')) {
    // Use MutationObserver where native Promise is not available,
    // e.g. PhantomJS, iOS7, Android 4.4
    // (#6466 MutationObserver is unreliable in IE11)
    let counter = 1;
    const observer = new MutationObserver(flushCallbacks);
    const textNode = document.createTextNode(String(counter));
    observer.observe(textNode, {
        characterData: true
    });
}
else if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) ;
else ;

const seenObjects = new _Set();
/**
 * Recursively traverse an object to evoke all converted
 * getters, so that every nested property inside the object
 * is collected as a "deep" dependency.
 */
function traverse(val) {
    _traverse(val, seenObjects);
    seenObjects.clear();
    return val;
}
function _traverse(val, seen) {
    let i, keys;
    const isA = isArray(val);
    if ((!isA && !isObject(val)) ||
        val.__v_skip /* ReactiveFlags.SKIP */ ||
        Object.isFrozen(val) ||
        val instanceof VNode) {
        return;
    }
    if (val.__ob__) {
        const depId = val.__ob__.dep.id;
        if (seen.has(depId)) {
            return;
        }
        seen.add(depId);
    }
    if (isA) {
        i = val.length;
        while (i--)
            _traverse(val[i], seen);
    }
    else if (isRef(val)) {
        _traverse(val.value, seen);
    }
    else {
        keys = Object.keys(val);
        i = keys.length;
        while (i--)
            _traverse(val[keys[i]], seen);
    }
}

function resolveInject(inject, vm) {
    if (inject) {
        // inject is :any because flow is not smart enough to figure out cached
        const result = Object.create(null);
        const keys = hasSymbol ? Reflect.ownKeys(inject) : Object.keys(inject);
        for (let i = 0; i < keys.length; i++) {
            const key = keys[i];
            // #6574 in case the inject object is observed...
            if (key === '__ob__')
                continue;
            const provideKey = inject[key].from;
            if (provideKey in vm._provided) {
                result[key] = vm._provided[provideKey];
            }
            else if ('default' in inject[key]) {
                const provideDefault = inject[key].default;
                result[key] = isFunction(provideDefault)
                    ? provideDefault.call(vm)
                    : provideDefault;
            }
            else if (process.env.NODE_ENV !== 'production') {
                warn$2(`Injection "${key}" not found`, vm);
            }
        }
        return result;
    }
}

function resolveConstructorOptions(Ctor) {
    let options = Ctor.options;
    if (Ctor.super) {
        const superOptions = resolveConstructorOptions(Ctor.super);
        const cachedSuperOptions = Ctor.superOptions;
        if (superOptions !== cachedSuperOptions) {
            // super option changed,
            // need to resolve new options.
            Ctor.superOptions = superOptions;
            // check if there are any late-modified/attached options (#4976)
            const modifiedOptions = resolveModifiedOptions(Ctor);
            // update base extend options
            if (modifiedOptions) {
                extend(Ctor.extendOptions, modifiedOptions);
            }
            options = Ctor.options = mergeOptions(superOptions, Ctor.extendOptions);
            if (options.name) {
                options.components[options.name] = Ctor;
            }
        }
    }
    return options;
}
function resolveModifiedOptions(Ctor) {
    let modified;
    const latest = Ctor.options;
    const sealed = Ctor.sealedOptions;
    for (const key in latest) {
        if (latest[key] !== sealed[key]) {
            if (!modified)
                modified = {};
            modified[key] = latest[key];
        }
    }
    return modified;
}

function FunctionalRenderContext(data, props, children, parent, Ctor) {
    const options = Ctor.options;
    // ensure the createElement function in functional components
    // gets a unique context - this is necessary for correct named slot check
    let contextVm;
    if (hasOwn(parent, '_uid')) {
        contextVm = Object.create(parent);
        contextVm._original = parent;
    }
    else {
        // the context vm passed in is a functional context as well.
        // in this case we want to make sure we are able to get a hold to the
        // real context instance.
        contextVm = parent;
        // @ts-ignore
        parent = parent._original;
    }
    const isCompiled = isTrue(options._compiled);
    const needNormalization = !isCompiled;
    this.data = data;
    this.props = props;
    this.children = children;
    this.parent = parent;
    this.listeners = data.on || emptyObject;
    this.injections = resolveInject(options.inject, parent);
    this.slots = () => {
        if (!this.$slots) {
            normalizeScopedSlots(parent, data.scopedSlots, (this.$slots = resolveSlots(children, parent)));
        }
        return this.$slots;
    };
    Object.defineProperty(this, 'scopedSlots', {
        enumerable: true,
        get() {
            return normalizeScopedSlots(parent, data.scopedSlots, this.slots());
        }
    });
    // support for compiled functional template
    if (isCompiled) {
        // exposing $options for renderStatic()
        this.$options = options;
        // pre-resolve slots for renderSlot()
        this.$slots = this.slots();
        this.$scopedSlots = normalizeScopedSlots(parent, data.scopedSlots, this.$slots);
    }
    if (options._scopeId) {
        this._c = (a, b, c, d) => {
            const vnode = createElement(contextVm, a, b, c, d, needNormalization);
            if (vnode && !isArray(vnode)) {
                vnode.fnScopeId = options._scopeId;
                vnode.fnContext = parent;
            }
            return vnode;
        };
    }
    else {
        this._c = (a, b, c, d) => createElement(contextVm, a, b, c, d, needNormalization);
    }
}
installRenderHelpers(FunctionalRenderContext.prototype);
function createFunctionalComponent(Ctor, propsData, data, contextVm, children) {
    const options = Ctor.options;
    const props = {};
    const propOptions = options.props;
    if (isDef(propOptions)) {
        for (const key in propOptions) {
            props[key] = validateProp(key, propOptions, propsData || emptyObject);
        }
    }
    else {
        if (isDef(data.attrs))
            mergeProps(props, data.attrs);
        if (isDef(data.props))
            mergeProps(props, data.props);
    }
    const renderContext = new FunctionalRenderContext(data, props, children, contextVm, Ctor);
    const vnode = options.render.call(null, renderContext._c, renderContext);
    if (vnode instanceof VNode) {
        return cloneAndMarkFunctionalResult(vnode, data, renderContext.parent, options, renderContext);
    }
    else if (isArray(vnode)) {
        const vnodes = normalizeChildren(vnode) || [];
        const res = new Array(vnodes.length);
        for (let i = 0; i < vnodes.length; i++) {
            res[i] = cloneAndMarkFunctionalResult(vnodes[i], data, renderContext.parent, options, renderContext);
        }
        return res;
    }
}
function cloneAndMarkFunctionalResult(vnode, data, contextVm, options, renderContext) {
    // #7817 clone node before setting fnContext, otherwise if the node is reused
    // (e.g. it was from a cached normal slot) the fnContext causes named slots
    // that should not be matched to match.
    const clone = cloneVNode(vnode);
    clone.fnContext = contextVm;
    clone.fnOptions = options;
    if (process.env.NODE_ENV !== 'production') {
        (clone.devtoolsMeta = clone.devtoolsMeta || {}).renderContext =
            renderContext;
    }
    if (data.slot) {
        (clone.data || (clone.data = {})).slot = data.slot;
    }
    return clone;
}
function mergeProps(to, from) {
    for (const key in from) {
        to[camelize(key)] = from[key];
    }
}

function getComponentName(options) {
    return options.name || options.__name || options._componentTag;
}
// inline hooks to be invoked on component VNodes during patch
const componentVNodeHooks = {
    init(vnode, hydrating) {
        if (vnode.componentInstance &&
            !vnode.componentInstance._isDestroyed &&
            vnode.data.keepAlive) {
            // kept-alive components, treat as a patch
            const mountedNode = vnode; // work around flow
            componentVNodeHooks.prepatch(mountedNode, mountedNode);
        }
        else {
            const child = (vnode.componentInstance = createComponentInstanceForVnode(vnode, activeInstance));
            child.$mount(hydrating ? vnode.elm : undefined, hydrating);
        }
    },
    prepatch(oldVnode, vnode) {
        const options = vnode.componentOptions;
        const child = (vnode.componentInstance = oldVnode.componentInstance);
        updateChildComponent(child, options.propsData, // updated props
        options.listeners, // updated listeners
        vnode, // new parent vnode
        options.children // new children
        );
    },
    insert(vnode) {
        const { context, componentInstance } = vnode;
        if (!componentInstance._isMounted) {
            componentInstance._isMounted = true;
            callHook(componentInstance, 'mounted');
        }
        if (vnode.data.keepAlive) {
            if (context._isMounted) {
                // vue-router#1212
                // During updates, a kept-alive component's child components may
                // change, so directly walking the tree here may call activated hooks
                // on incorrect children. Instead we push them into a queue which will
                // be processed after the whole patch process ended.
                queueActivatedComponent(componentInstance);
            }
            else {
                activateChildComponent(componentInstance, true /* direct */);
            }
        }
    },
    destroy(vnode) {
        const { componentInstance } = vnode;
        if (!componentInstance._isDestroyed) {
            if (!vnode.data.keepAlive) {
                componentInstance.$destroy();
            }
            else {
                deactivateChildComponent(componentInstance, true /* direct */);
            }
        }
    }
};
const hooksToMerge = Object.keys(componentVNodeHooks);
function createComponent(Ctor, data, context, children, tag) {
    if (isUndef(Ctor)) {
        return;
    }
    const baseCtor = context.$options._base;
    // plain options object: turn it into a constructor
    if (isObject(Ctor)) {
        Ctor = baseCtor.extend(Ctor);
    }
    // if at this stage it's not a constructor or an async component factory,
    // reject.
    if (typeof Ctor !== 'function') {
        if (process.env.NODE_ENV !== 'production') {
            warn$2(`Invalid Component definition: ${String(Ctor)}`, context);
        }
        return;
    }
    // async component
    let asyncFactory;
    // @ts-expect-error
    if (isUndef(Ctor.cid)) {
        asyncFactory = Ctor;
        Ctor = resolveAsyncComponent(asyncFactory);
        if (Ctor === undefined) {
            // return a placeholder node for async component, which is rendered
            // as a comment node but preserves all the raw information for the node.
            // the information will be used for async server-rendering and hydration.
            return createAsyncPlaceholder(asyncFactory, data, context, children, tag);
        }
    }
    data = data || {};
    // resolve constructor options in case global mixins are applied after
    // component constructor creation
    resolveConstructorOptions(Ctor);
    // transform component v-model data into props & events
    if (isDef(data.model)) {
        // @ts-expect-error
        transformModel(Ctor.options, data);
    }
    // extract props
    // @ts-expect-error
    const propsData = extractPropsFromVNodeData(data, Ctor, tag);
    // functional component
    // @ts-expect-error
    if (isTrue(Ctor.options.functional)) {
        return createFunctionalComponent(Ctor, propsData, data, context, children);
    }
    // extract listeners, since these needs to be treated as
    // child component listeners instead of DOM listeners
    const listeners = data.on;
    // replace with listeners with .native modifier
    // so it gets processed during parent component patch.
    data.on = data.nativeOn;
    // @ts-expect-error
    if (isTrue(Ctor.options.abstract)) {
        // abstract components do not keep anything
        // other than props & listeners & slot
        // work around flow
        const slot = data.slot;
        data = {};
        if (slot) {
            data.slot = slot;
        }
    }
    // install component management hooks onto the placeholder node
    installComponentHooks(data);
    // return a placeholder vnode
    // @ts-expect-error
    const name = getComponentName(Ctor.options) || tag;
    const vnode = new VNode(
    // @ts-expect-error
    `vue-component-${Ctor.cid}${name ? `-${name}` : ''}`, data, undefined, undefined, undefined, context, 
    // @ts-expect-error
    { Ctor, propsData, listeners, tag, children }, asyncFactory);
    return vnode;
}
function createComponentInstanceForVnode(
// we know it's MountedComponentVNode but flow doesn't
vnode, 
// activeInstance in lifecycle state
parent) {
    const options = {
        _isComponent: true,
        _parentVnode: vnode,
        parent
    };
    // check inline-template render functions
    const inlineTemplate = vnode.data.inlineTemplate;
    if (isDef(inlineTemplate)) {
        options.render = inlineTemplate.render;
        options.staticRenderFns = inlineTemplate.staticRenderFns;
    }
    return new vnode.componentOptions.Ctor(options);
}
function installComponentHooks(data) {
    const hooks = data.hook || (data.hook = {});
    for (let i = 0; i < hooksToMerge.length; i++) {
        const key = hooksToMerge[i];
        const existing = hooks[key];
        const toMerge = componentVNodeHooks[key];
        // @ts-expect-error
        if (existing !== toMerge && !(existing && existing._merged)) {
            hooks[key] = existing ? mergeHook(toMerge, existing) : toMerge;
        }
    }
}
function mergeHook(f1, f2) {
    const merged = (a, b) => {
        // flow complains about extra args which is why we use any
        f1(a, b);
        f2(a, b);
    };
    merged._merged = true;
    return merged;
}
// transform component v-model info (value and callback) into
// prop and event handler respectively.
function transformModel(options, data) {
    const prop = (options.model && options.model.prop) || 'value';
    const event = (options.model && options.model.event) || 'input';
    (data.attrs || (data.attrs = {}))[prop] = data.model.value;
    const on = data.on || (data.on = {});
    const existing = on[event];
    const callback = data.model.callback;
    if (isDef(existing)) {
        if (isArray(existing)
            ? existing.indexOf(callback) === -1
            : existing !== callback) {
            on[event] = [callback].concat(existing);
        }
    }
    else {
        on[event] = callback;
    }
}

let warn$2 = noop;
let tip = noop;
let generateComponentTrace; // work around flow check
let formatComponentName;
if (process.env.NODE_ENV !== 'production') {
    const hasConsole = typeof console !== 'undefined';
    const classifyRE = /(?:^|[-_])(\w)/g;
    const classify = str => str.replace(classifyRE, c => c.toUpperCase()).replace(/[-_]/g, '');
    warn$2 = (msg, vm = currentInstance) => {
        const trace = vm ? generateComponentTrace(vm) : '';
        if (hasConsole && !config.silent) {
            console.error(`[Vue warn]: ${msg}${trace}`);
        }
    };
    tip = (msg, vm) => {
        if (hasConsole && !config.silent) {
            console.warn(`[Vue tip]: ${msg}` + (vm ? generateComponentTrace(vm) : ''));
        }
    };
    formatComponentName = (vm, includeFile) => {
        if (vm.$root === vm) {
            return '<Root>';
        }
        const options = isFunction(vm) && vm.cid != null
            ? vm.options
            : vm._isVue
                ? vm.$options || vm.constructor.options
                : vm;
        let name = getComponentName(options);
        const file = options.__file;
        if (!name && file) {
            const match = file.match(/([^/\\]+)\.vue$/);
            name = match && match[1];
        }
        return ((name ? `<${classify(name)}>` : `<Anonymous>`) +
            (file && includeFile !== false ? ` at ${file}` : ''));
    };
    const repeat = (str, n) => {
        let res = '';
        while (n) {
            if (n % 2 === 1)
                res += str;
            if (n > 1)
                str += str;
            n >>= 1;
        }
        return res;
    };
    generateComponentTrace = (vm) => {
        if (vm._isVue && vm.$parent) {
            const tree = [];
            let currentRecursiveSequence = 0;
            while (vm) {
                if (tree.length > 0) {
                    const last = tree[tree.length - 1];
                    if (last.constructor === vm.constructor) {
                        currentRecursiveSequence++;
                        vm = vm.$parent;
                        continue;
                    }
                    else if (currentRecursiveSequence > 0) {
                        tree[tree.length - 1] = [last, currentRecursiveSequence];
                        currentRecursiveSequence = 0;
                    }
                }
                tree.push(vm);
                vm = vm.$parent;
            }
            return ('\n\nfound in\n\n' +
                tree
                    .map((vm, i) => `${i === 0 ? '---> ' : repeat(' ', 5 + i * 2)}${isArray(vm)
                    ? `${formatComponentName(vm[0])}... (${vm[1]} recursive calls)`
                    : formatComponentName(vm)}`)
                    .join('\n'));
        }
        else {
            return `\n\n(found in ${formatComponentName(vm)})`;
        }
    };
}

/**
 * Option overwriting strategies are functions that handle
 * how to merge a parent option value and a child option
 * value into the final value.
 */
const strats = config.optionMergeStrategies;
/**
 * Options with restrictions
 */
if (process.env.NODE_ENV !== 'production') {
    strats.el = strats.propsData = function (parent, child, vm, key) {
        if (!vm) {
            warn$2(`option "${key}" can only be used during instance ` +
                'creation with the `new` keyword.');
        }
        return defaultStrat(parent, child);
    };
}
/**
 * Helper that recursively merges two data objects together.
 */
function mergeData(to, from, recursive = true) {
    if (!from)
        return to;
    let key, toVal, fromVal;
    const keys = hasSymbol
        ? Reflect.ownKeys(from)
        : Object.keys(from);
    for (let i = 0; i < keys.length; i++) {
        key = keys[i];
        // in case the object is already observed...
        if (key === '__ob__')
            continue;
        toVal = to[key];
        fromVal = from[key];
        if (!recursive || !hasOwn(to, key)) {
            set(to, key, fromVal);
        }
        else if (toVal !== fromVal &&
            isPlainObject(toVal) &&
            isPlainObject(fromVal)) {
            mergeData(toVal, fromVal);
        }
    }
    return to;
}
/**
 * Data
 */
function mergeDataOrFn(parentVal, childVal, vm) {
    if (!vm) {
        // in a Vue.extend merge, both should be functions
        if (!childVal) {
            return parentVal;
        }
        if (!parentVal) {
            return childVal;
        }
        // when parentVal & childVal are both present,
        // we need to return a function that returns the
        // merged result of both functions... no need to
        // check if parentVal is a function here because
        // it has to be a function to pass previous merges.
        return function mergedDataFn() {
            return mergeData(isFunction(childVal) ? childVal.call(this, this) : childVal, isFunction(parentVal) ? parentVal.call(this, this) : parentVal);
        };
    }
    else {
        return function mergedInstanceDataFn() {
            // instance merge
            const instanceData = isFunction(childVal)
                ? childVal.call(vm, vm)
                : childVal;
            const defaultData = isFunction(parentVal)
                ? parentVal.call(vm, vm)
                : parentVal;
            if (instanceData) {
                return mergeData(instanceData, defaultData);
            }
            else {
                return defaultData;
            }
        };
    }
}
strats.data = function (parentVal, childVal, vm) {
    if (!vm) {
        if (childVal && typeof childVal !== 'function') {
            process.env.NODE_ENV !== 'production' &&
                warn$2('The "data" option should be a function ' +
                    'that returns a per-instance value in component ' +
                    'definitions.', vm);
            return parentVal;
        }
        return mergeDataOrFn(parentVal, childVal);
    }
    return mergeDataOrFn(parentVal, childVal, vm);
};
/**
 * Hooks and props are merged as arrays.
 */
function mergeLifecycleHook(parentVal, childVal) {
    const res = childVal
        ? parentVal
            ? parentVal.concat(childVal)
            : isArray(childVal)
                ? childVal
                : [childVal]
        : parentVal;
    return res ? dedupeHooks(res) : res;
}
function dedupeHooks(hooks) {
    const res = [];
    for (let i = 0; i < hooks.length; i++) {
        if (res.indexOf(hooks[i]) === -1) {
            res.push(hooks[i]);
        }
    }
    return res;
}
LIFECYCLE_HOOKS.forEach(hook => {
    strats[hook] = mergeLifecycleHook;
});
/**
 * Assets
 *
 * When a vm is present (instance creation), we need to do
 * a three-way merge between constructor options, instance
 * options and parent options.
 */
function mergeAssets(parentVal, childVal, vm, key) {
    const res = Object.create(parentVal || null);
    if (childVal) {
        process.env.NODE_ENV !== 'production' && assertObjectType(key, childVal, vm);
        return extend(res, childVal);
    }
    else {
        return res;
    }
}
ASSET_TYPES.forEach(function (type) {
    strats[type + 's'] = mergeAssets;
});
/**
 * Watchers.
 *
 * Watchers hashes should not overwrite one
 * another, so we merge them as arrays.
 */
strats.watch = function (parentVal, childVal, vm, key) {
    // work around Firefox's Object.prototype.watch...
    //@ts-expect-error work around
    if (parentVal === nativeWatch)
        parentVal = undefined;
    //@ts-expect-error work around
    if (childVal === nativeWatch)
        childVal = undefined;
    /* istanbul ignore if */
    if (!childVal)
        return Object.create(parentVal || null);
    if (process.env.NODE_ENV !== 'production') {
        assertObjectType(key, childVal, vm);
    }
    if (!parentVal)
        return childVal;
    const ret = {};
    extend(ret, parentVal);
    for (const key in childVal) {
        let parent = ret[key];
        const child = childVal[key];
        if (parent && !isArray(parent)) {
            parent = [parent];
        }
        ret[key] = parent ? parent.concat(child) : isArray(child) ? child : [child];
    }
    return ret;
};
/**
 * Other object hashes.
 */
strats.props =
    strats.methods =
        strats.inject =
            strats.computed =
                function (parentVal, childVal, vm, key) {
                    if (childVal && process.env.NODE_ENV !== 'production') {
                        assertObjectType(key, childVal, vm);
                    }
                    if (!parentVal)
                        return childVal;
                    const ret = Object.create(null);
                    extend(ret, parentVal);
                    if (childVal)
                        extend(ret, childVal);
                    return ret;
                };
strats.provide = function (parentVal, childVal) {
    if (!parentVal)
        return childVal;
    return function () {
        const ret = Object.create(null);
        mergeData(ret, isFunction(parentVal) ? parentVal.call(this) : parentVal);
        if (childVal) {
            mergeData(ret, isFunction(childVal) ? childVal.call(this) : childVal, false // non-recursive
            );
        }
        return ret;
    };
};
/**
 * Default strategy.
 */
const defaultStrat = function (parentVal, childVal) {
    return childVal === undefined ? parentVal : childVal;
};
/**
 * Validate component names
 */
function checkComponents(options) {
    for (const key in options.components) {
        validateComponentName(key);
    }
}
function validateComponentName(name) {
    if (!new RegExp(`^[a-zA-Z][\\-\\.0-9_${unicodeRegExp.source}]*$`).test(name)) {
        warn$2('Invalid component name: "' +
            name +
            '". Component names ' +
            'should conform to valid custom element name in html5 specification.');
    }
    if (isBuiltInTag(name) || config.isReservedTag(name)) {
        warn$2('Do not use built-in or reserved HTML elements as component ' +
            'id: ' +
            name);
    }
}
/**
 * Ensure all props option syntax are normalized into the
 * Object-based format.
 */
function normalizeProps(options, vm) {
    const props = options.props;
    if (!props)
        return;
    const res = {};
    let i, val, name;
    if (isArray(props)) {
        i = props.length;
        while (i--) {
            val = props[i];
            if (typeof val === 'string') {
                name = camelize(val);
                res[name] = { type: null };
            }
            else if (process.env.NODE_ENV !== 'production') {
                warn$2('props must be strings when using array syntax.');
            }
        }
    }
    else if (isPlainObject(props)) {
        for (const key in props) {
            val = props[key];
            name = camelize(key);
            res[name] = isPlainObject(val) ? val : { type: val };
        }
    }
    else if (process.env.NODE_ENV !== 'production') {
        warn$2(`Invalid value for option "props": expected an Array or an Object, ` +
            `but got ${toRawType(props)}.`, vm);
    }
    options.props = res;
}
/**
 * Normalize all injections into Object-based format
 */
function normalizeInject(options, vm) {
    const inject = options.inject;
    if (!inject)
        return;
    const normalized = (options.inject = {});
    if (isArray(inject)) {
        for (let i = 0; i < inject.length; i++) {
            normalized[inject[i]] = { from: inject[i] };
        }
    }
    else if (isPlainObject(inject)) {
        for (const key in inject) {
            const val = inject[key];
            normalized[key] = isPlainObject(val)
                ? extend({ from: key }, val)
                : { from: val };
        }
    }
    else if (process.env.NODE_ENV !== 'production') {
        warn$2(`Invalid value for option "inject": expected an Array or an Object, ` +
            `but got ${toRawType(inject)}.`, vm);
    }
}
/**
 * Normalize raw function directives into object format.
 */
function normalizeDirectives(options) {
    const dirs = options.directives;
    if (dirs) {
        for (const key in dirs) {
            const def = dirs[key];
            if (isFunction(def)) {
                dirs[key] = { bind: def, update: def };
            }
        }
    }
}
function assertObjectType(name, value, vm) {
    if (!isPlainObject(value)) {
        warn$2(`Invalid value for option "${name}": expected an Object, ` +
            `but got ${toRawType(value)}.`, vm);
    }
}
/**
 * Merge two option objects into a new one.
 * Core utility used in both instantiation and inheritance.
 */
function mergeOptions(parent, child, vm) {
    if (process.env.NODE_ENV !== 'production') {
        checkComponents(child);
    }
    if (isFunction(child)) {
        // @ts-expect-error
        child = child.options;
    }
    normalizeProps(child, vm);
    normalizeInject(child, vm);
    normalizeDirectives(child);
    // Apply extends and mixins on the child options,
    // but only if it is a raw options object that isn't
    // the result of another mergeOptions call.
    // Only merged options has the _base property.
    if (!child._base) {
        if (child.extends) {
            parent = mergeOptions(parent, child.extends, vm);
        }
        if (child.mixins) {
            for (let i = 0, l = child.mixins.length; i < l; i++) {
                parent = mergeOptions(parent, child.mixins[i], vm);
            }
        }
    }
    const options = {};
    let key;
    for (key in parent) {
        mergeField(key);
    }
    for (key in child) {
        if (!hasOwn(parent, key)) {
            mergeField(key);
        }
    }
    function mergeField(key) {
        const strat = strats[key] || defaultStrat;
        options[key] = strat(parent[key], child[key], vm, key);
    }
    return options;
}
/**
 * Resolve an asset.
 * This function is used because child instances need access
 * to assets defined in its ancestor chain.
 */
function resolveAsset(options, type, id, warnMissing) {
    /* istanbul ignore if */
    if (typeof id !== 'string') {
        return;
    }
    const assets = options[type];
    // check local registration variations first
    if (hasOwn(assets, id))
        return assets[id];
    const camelizedId = camelize(id);
    if (hasOwn(assets, camelizedId))
        return assets[camelizedId];
    const PascalCaseId = capitalize(camelizedId);
    if (hasOwn(assets, PascalCaseId))
        return assets[PascalCaseId];
    // fallback to prototype chain
    const res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
    if (process.env.NODE_ENV !== 'production' && warnMissing && !res) {
        warn$2('Failed to resolve ' + type.slice(0, -1) + ': ' + id);
    }
    return res;
}

function validateProp(key, propOptions, propsData, vm) {
    const prop = propOptions[key];
    const absent = !hasOwn(propsData, key);
    let value = propsData[key];
    // boolean casting
    const booleanIndex = getTypeIndex(Boolean, prop.type);
    if (booleanIndex > -1) {
        if (absent && !hasOwn(prop, 'default')) {
            value = false;
        }
        else if (value === '' || value === hyphenate(key)) {
            // only cast empty string / same name to boolean if
            // boolean has higher priority
            const stringIndex = getTypeIndex(String, prop.type);
            if (stringIndex < 0 || booleanIndex < stringIndex) {
                value = true;
            }
        }
    }
    // check default value
    if (value === undefined) {
        value = getPropDefaultValue(vm, prop, key);
        // since the default value is a fresh copy,
        // make sure to observe it.
        const prevShouldObserve = shouldObserve;
        toggleObserving(true);
        observe(value);
        toggleObserving(prevShouldObserve);
    }
    if (process.env.NODE_ENV !== 'production') {
        assertProp(prop, key, value, vm, absent);
    }
    return value;
}
/**
 * Get the default value of a prop.
 */
function getPropDefaultValue(vm, prop, key) {
    // no default, return undefined
    if (!hasOwn(prop, 'default')) {
        return undefined;
    }
    const def = prop.default;
    // warn against non-factory defaults for Object & Array
    if (process.env.NODE_ENV !== 'production' && isObject(def)) {
        warn$2('Invalid default value for prop "' +
            key +
            '": ' +
            'Props with type Object/Array must use a factory function ' +
            'to return the default value.', vm);
    }
    // the raw prop value was also undefined from previous render,
    // return previous default value to avoid unnecessary watcher trigger
    if (vm &&
        vm.$options.propsData &&
        vm.$options.propsData[key] === undefined &&
        vm._props[key] !== undefined) {
        return vm._props[key];
    }
    // call factory function for non-Function types
    // a value is Function if its prototype is function even across different execution context
    return isFunction(def) && getType(prop.type) !== 'Function'
        ? def.call(vm)
        : def;
}
/**
 * Assert whether a prop is valid.
 */
function assertProp(prop, name, value, vm, absent) {
    if (prop.required && absent) {
        warn$2('Missing required prop: "' + name + '"', vm);
        return;
    }
    if (value == null && !prop.required) {
        return;
    }
    let type = prop.type;
    let valid = !type || type === true;
    const expectedTypes = [];
    if (type) {
        if (!isArray(type)) {
            type = [type];
        }
        for (let i = 0; i < type.length && !valid; i++) {
            const assertedType = assertType(value, type[i], vm);
            expectedTypes.push(assertedType.expectedType || '');
            valid = assertedType.valid;
        }
    }
    const haveExpectedTypes = expectedTypes.some(t => t);
    if (!valid && haveExpectedTypes) {
        warn$2(getInvalidTypeMessage(name, value, expectedTypes), vm);
        return;
    }
    const validator = prop.validator;
    if (validator) {
        if (!validator(value)) {
            warn$2('Invalid prop: custom validator check failed for prop "' + name + '".', vm);
        }
    }
}
const simpleCheckRE = /^(String|Number|Boolean|Function|Symbol|BigInt)$/;
function assertType(value, type, vm) {
    let valid;
    const expectedType = getType(type);
    if (simpleCheckRE.test(expectedType)) {
        const t = typeof value;
        valid = t === expectedType.toLowerCase();
        // for primitive wrapper objects
        if (!valid && t === 'object') {
            valid = value instanceof type;
        }
    }
    else if (expectedType === 'Object') {
        valid = isPlainObject(value);
    }
    else if (expectedType === 'Array') {
        valid = isArray(value);
    }
    else {
        try {
            valid = value instanceof type;
        }
        catch (e) {
            warn$2('Invalid prop type: "' + String(type) + '" is not a constructor', vm);
            valid = false;
        }
    }
    return {
        valid,
        expectedType
    };
}
const functionTypeCheckRE = /^\s*function (\w+)/;
/**
 * Use function string name to check built-in types,
 * because a simple equality check will fail when running
 * across different vms / iframes.
 */
function getType(fn) {
    const match = fn && fn.toString().match(functionTypeCheckRE);
    return match ? match[1] : '';
}
function isSameType(a, b) {
    return getType(a) === getType(b);
}
function getTypeIndex(type, expectedTypes) {
    if (!isArray(expectedTypes)) {
        return isSameType(expectedTypes, type) ? 0 : -1;
    }
    for (let i = 0, len = expectedTypes.length; i < len; i++) {
        if (isSameType(expectedTypes[i], type)) {
            return i;
        }
    }
    return -1;
}
function getInvalidTypeMessage(name, value, expectedTypes) {
    let message = `Invalid prop: type check failed for prop "${name}".` +
        ` Expected ${expectedTypes.map(capitalize).join(', ')}`;
    const expectedType = expectedTypes[0];
    const receivedType = toRawType(value);
    // check if we need to specify expected value
    if (expectedTypes.length === 1 &&
        isExplicable(expectedType) &&
        isExplicable(typeof value) &&
        !isBoolean(expectedType, receivedType)) {
        message += ` with value ${styleValue(value, expectedType)}`;
    }
    message += `, got ${receivedType} `;
    // check if we need to specify received value
    if (isExplicable(receivedType)) {
        message += `with value ${styleValue(value, receivedType)}.`;
    }
    return message;
}
function styleValue(value, type) {
    if (type === 'String') {
        return `"${value}"`;
    }
    else if (type === 'Number') {
        return `${Number(value)}`;
    }
    else {
        return `${value}`;
    }
}
const EXPLICABLE_TYPES = ['string', 'number', 'boolean'];
function isExplicable(value) {
    return EXPLICABLE_TYPES.some(elem => value.toLowerCase() === elem);
}
function isBoolean(...args) {
    return args.some(elem => elem.toLowerCase() === 'boolean');
}

// these are reserved for web because they are directly compiled away
// during template compilation
makeMap('style,class');
// attributes that should be using props for binding
const acceptValue = makeMap('input,textarea,option,select,progress');
const mustUseProp = (tag, type, attr) => {
    return ((attr === 'value' && acceptValue(tag) && type !== 'button') ||
        (attr === 'selected' && tag === 'option') ||
        (attr === 'checked' && tag === 'input') ||
        (attr === 'muted' && tag === 'video'));
};
const isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');
makeMap('events,caret,typing,plaintext-only');
const isBooleanAttr = makeMap('allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
    'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
    'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
    'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
    'required,reversed,scoped,seamless,selected,sortable,' +
    'truespeed,typemustmatch,visible');

const isHTMLTag = makeMap('html,body,base,head,link,meta,style,title,' +
    'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
    'div,dd,dl,dt,figcaption,figure,picture,hr,img,li,main,ol,p,pre,ul,' +
    'a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,' +
    's,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,video,' +
    'embed,object,param,source,canvas,script,noscript,del,ins,' +
    'caption,col,colgroup,table,thead,tbody,td,th,tr,' +
    'button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,' +
    'output,progress,select,textarea,' +
    'details,dialog,menu,menuitem,summary,' +
    'content,element,shadow,template,blockquote,iframe,tfoot');
// this map is intentionally selective, only covering SVG elements that may
// contain child elements.
const isSVG = makeMap('svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
    'foreignobject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
    'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view', true);
const isPreTag = (tag) => tag === 'pre';
const isReservedTag = (tag) => {
    return isHTMLTag(tag) || isSVG(tag);
};
function getTagNamespace(tag) {
    if (isSVG(tag)) {
        return 'svg';
    }
    // basic support for MathML
    // note it doesn't support other MathML elements being component roots
    if (tag === 'math') {
        return 'math';
    }
}
makeMap('text,number,password,search,email,tel,url');

const validDivisionCharRE = /[\w).+\-_$\]]/;
function parseFilters(exp) {
    let inSingle = false;
    let inDouble = false;
    let inTemplateString = false;
    let inRegex = false;
    let curly = 0;
    let square = 0;
    let paren = 0;
    let lastFilterIndex = 0;
    let c, prev, i, expression, filters;
    for (i = 0; i < exp.length; i++) {
        prev = c;
        c = exp.charCodeAt(i);
        if (inSingle) {
            if (c === 0x27 && prev !== 0x5c)
                inSingle = false;
        }
        else if (inDouble) {
            if (c === 0x22 && prev !== 0x5c)
                inDouble = false;
        }
        else if (inTemplateString) {
            if (c === 0x60 && prev !== 0x5c)
                inTemplateString = false;
        }
        else if (inRegex) {
            if (c === 0x2f && prev !== 0x5c)
                inRegex = false;
        }
        else if (c === 0x7c && // pipe
            exp.charCodeAt(i + 1) !== 0x7c &&
            exp.charCodeAt(i - 1) !== 0x7c &&
            !curly &&
            !square &&
            !paren) {
            if (expression === undefined) {
                // first filter, end of expression
                lastFilterIndex = i + 1;
                expression = exp.slice(0, i).trim();
            }
            else {
                pushFilter();
            }
        }
        else {
            switch (c) {
                case 0x22:
                    inDouble = true;
                    break; // "
                case 0x27:
                    inSingle = true;
                    break; // '
                case 0x60:
                    inTemplateString = true;
                    break; // `
                case 0x28:
                    paren++;
                    break; // (
                case 0x29:
                    paren--;
                    break; // )
                case 0x5b:
                    square++;
                    break; // [
                case 0x5d:
                    square--;
                    break; // ]
                case 0x7b:
                    curly++;
                    break; // {
                case 0x7d:
                    curly--;
                    break; // }
            }
            if (c === 0x2f) {
                // /
                let j = i - 1;
                let p;
                // find first non-whitespace prev char
                for (; j >= 0; j--) {
                    p = exp.charAt(j);
                    if (p !== ' ')
                        break;
                }
                if (!p || !validDivisionCharRE.test(p)) {
                    inRegex = true;
                }
            }
        }
    }
    if (expression === undefined) {
        expression = exp.slice(0, i).trim();
    }
    else if (lastFilterIndex !== 0) {
        pushFilter();
    }
    function pushFilter() {
        (filters || (filters = [])).push(exp.slice(lastFilterIndex, i).trim());
        lastFilterIndex = i + 1;
    }
    if (filters) {
        for (i = 0; i < filters.length; i++) {
            expression = wrapFilter(expression, filters[i]);
        }
    }
    return expression;
}
function wrapFilter(exp, filter) {
    const i = filter.indexOf('(');
    if (i < 0) {
        // _f: resolveFilter
        return `_f("${filter}")(${exp})`;
    }
    else {
        const name = filter.slice(0, i);
        const args = filter.slice(i + 1);
        return `_f("${name}")(${exp}${args !== ')' ? ',' + args : args}`;
    }
}

const defaultTagRE = /\{\{((?:.|\r?\n)+?)\}\}/g;
const regexEscapeRE = /[-.*+?^${}()|[\]\/\\]/g;
const buildRegex = cached(delimiters => {
    const open = delimiters[0].replace(regexEscapeRE, '\\$&');
    const close = delimiters[1].replace(regexEscapeRE, '\\$&');
    return new RegExp(open + '((?:.|\\n)+?)' + close, 'g');
});
function parseText(text, delimiters) {
    //@ts-expect-error
    const tagRE = delimiters ? buildRegex(delimiters) : defaultTagRE;
    if (!tagRE.test(text)) {
        return;
    }
    const tokens = [];
    const rawTokens = [];
    let lastIndex = (tagRE.lastIndex = 0);
    let match, index, tokenValue;
    while ((match = tagRE.exec(text))) {
        index = match.index;
        // push text token
        if (index > lastIndex) {
            rawTokens.push((tokenValue = text.slice(lastIndex, index)));
            tokens.push(JSON.stringify(tokenValue));
        }
        // tag token
        const exp = parseFilters(match[1].trim());
        tokens.push(`_s(${exp})`);
        rawTokens.push({ '@binding': exp });
        lastIndex = index + match[0].length;
    }
    if (lastIndex < text.length) {
        rawTokens.push((tokenValue = text.slice(lastIndex)));
        tokens.push(JSON.stringify(tokenValue));
    }
    return {
        expression: tokens.join('+'),
        tokens: rawTokens
    };
}

/* eslint-disable no-unused-vars */
function baseWarn(msg, range) {
    console.error(`[Vue compiler]: ${msg}`);
}
/* eslint-enable no-unused-vars */
function pluckModuleFunction(modules, key) {
    return modules ? modules.map(m => m[key]).filter(_ => _) : [];
}
function addProp(el, name, value, range, dynamic) {
    (el.props || (el.props = [])).push(rangeSetItem({ name, value, dynamic }, range));
    el.plain = false;
}
function addAttr(el, name, value, range, dynamic) {
    const attrs = dynamic
        ? el.dynamicAttrs || (el.dynamicAttrs = [])
        : el.attrs || (el.attrs = []);
    attrs.push(rangeSetItem({ name, value, dynamic }, range));
    el.plain = false;
}
// add a raw attr (use this in preTransforms)
function addRawAttr(el, name, value, range) {
    el.attrsMap[name] = value;
    el.attrsList.push(rangeSetItem({ name, value }, range));
}
function addDirective(el, name, rawName, value, arg, isDynamicArg, modifiers, range) {
    (el.directives || (el.directives = [])).push(rangeSetItem({
        name,
        rawName,
        value,
        arg,
        isDynamicArg,
        modifiers
    }, range));
    el.plain = false;
}
function prependModifierMarker(symbol, name, dynamic) {
    return dynamic ? `_p(${name},"${symbol}")` : symbol + name; // mark the event as captured
}
function addHandler(el, name, value, modifiers, important, warn, range, dynamic) {
    modifiers = modifiers || emptyObject;
    // warn prevent and passive modifier
    /* istanbul ignore if */
    if (process.env.NODE_ENV !== 'production' && warn && modifiers.prevent && modifiers.passive) {
        warn("passive and prevent can't be used together. " +
            "Passive handler can't prevent default event.", range);
    }
    // normalize click.right and click.middle since they don't actually fire
    // this is technically browser-specific, but at least for now browsers are
    // the only target envs that have right/middle clicks.
    if (modifiers.right) {
        if (dynamic) {
            name = `(${name})==='click'?'contextmenu':(${name})`;
        }
        else if (name === 'click') {
            name = 'contextmenu';
            delete modifiers.right;
        }
    }
    else if (modifiers.middle) {
        if (dynamic) {
            name = `(${name})==='click'?'mouseup':(${name})`;
        }
        else if (name === 'click') {
            name = 'mouseup';
        }
    }
    // check capture modifier
    if (modifiers.capture) {
        delete modifiers.capture;
        name = prependModifierMarker('!', name, dynamic);
    }
    if (modifiers.once) {
        delete modifiers.once;
        name = prependModifierMarker('~', name, dynamic);
    }
    /* istanbul ignore if */
    if (modifiers.passive) {
        delete modifiers.passive;
        name = prependModifierMarker('&', name, dynamic);
    }
    let events;
    if (modifiers.native) {
        delete modifiers.native;
        events = el.nativeEvents || (el.nativeEvents = {});
    }
    else {
        events = el.events || (el.events = {});
    }
    const newHandler = rangeSetItem({ value: value.trim(), dynamic }, range);
    if (modifiers !== emptyObject) {
        newHandler.modifiers = modifiers;
    }
    const handlers = events[name];
    /* istanbul ignore if */
    if (Array.isArray(handlers)) {
        important ? handlers.unshift(newHandler) : handlers.push(newHandler);
    }
    else if (handlers) {
        events[name] = important ? [newHandler, handlers] : [handlers, newHandler];
    }
    else {
        events[name] = newHandler;
    }
    el.plain = false;
}
function getRawBindingAttr(el, name) {
    return (el.rawAttrsMap[':' + name] ||
        el.rawAttrsMap['v-bind:' + name] ||
        el.rawAttrsMap[name]);
}
function getBindingAttr(el, name, getStatic) {
    const dynamicValue = getAndRemoveAttr(el, ':' + name) || getAndRemoveAttr(el, 'v-bind:' + name);
    if (dynamicValue != null) {
        return parseFilters(dynamicValue);
    }
    else if (getStatic !== false) {
        const staticValue = getAndRemoveAttr(el, name);
        if (staticValue != null) {
            return JSON.stringify(staticValue);
        }
    }
}
// note: this only removes the attr from the Array (attrsList) so that it
// doesn't get processed by processAttrs.
// By default it does NOT remove it from the map (attrsMap) because the map is
// needed during codegen.
function getAndRemoveAttr(el, name, removeFromMap) {
    let val;
    if ((val = el.attrsMap[name]) != null) {
        const list = el.attrsList;
        for (let i = 0, l = list.length; i < l; i++) {
            if (list[i].name === name) {
                list.splice(i, 1);
                break;
            }
        }
    }
    if (removeFromMap) {
        delete el.attrsMap[name];
    }
    return val;
}
function getAndRemoveAttrByRegex(el, name) {
    const list = el.attrsList;
    for (let i = 0, l = list.length; i < l; i++) {
        const attr = list[i];
        if (name.test(attr.name)) {
            list.splice(i, 1);
            return attr;
        }
    }
}
function rangeSetItem(item, range) {
    if (range) {
        if (range.start != null) {
            item.start = range.start;
        }
        if (range.end != null) {
            item.end = range.end;
        }
    }
    return item;
}

function transformNode$1(el, options) {
    const warn = options.warn || baseWarn;
    const staticClass = getAndRemoveAttr(el, 'class');
    if (process.env.NODE_ENV !== 'production' && staticClass) {
        const res = parseText(staticClass, options.delimiters);
        if (res) {
            warn(`class="${staticClass}": ` +
                'Interpolation inside attributes has been removed. ' +
                'Use v-bind or the colon shorthand instead. For example, ' +
                'instead of <div class="{{ val }}">, use <div :class="val">.', el.rawAttrsMap['class']);
        }
    }
    if (staticClass) {
        el.staticClass = JSON.stringify(staticClass.replace(/\s+/g, ' ').trim());
    }
    const classBinding = getBindingAttr(el, 'class', false /* getStatic */);
    if (classBinding) {
        el.classBinding = classBinding;
    }
}
function genData$2(el) {
    let data = '';
    if (el.staticClass) {
        data += `staticClass:${el.staticClass},`;
    }
    if (el.classBinding) {
        data += `class:${el.classBinding},`;
    }
    return data;
}
var klass = {
    staticKeys: ['staticClass'],
    transformNode: transformNode$1,
    genData: genData$2
};

const parseStyleText = cached(function (cssText) {
    const res = {};
    const listDelimiter = /;(?![^(]*\))/g;
    const propertyDelimiter = /:(.+)/;
    cssText.split(listDelimiter).forEach(function (item) {
        if (item) {
            const tmp = item.split(propertyDelimiter);
            tmp.length > 1 && (res[tmp[0].trim()] = tmp[1].trim());
        }
    });
    return res;
});

function transformNode(el, options) {
    const warn = options.warn || baseWarn;
    const staticStyle = getAndRemoveAttr(el, 'style');
    if (staticStyle) {
        /* istanbul ignore if */
        if (process.env.NODE_ENV !== 'production') {
            const res = parseText(staticStyle, options.delimiters);
            if (res) {
                warn(`style="${staticStyle}": ` +
                    'Interpolation inside attributes has been removed. ' +
                    'Use v-bind or the colon shorthand instead. For example, ' +
                    'instead of <div style="{{ val }}">, use <div :style="val">.', el.rawAttrsMap['style']);
            }
        }
        el.staticStyle = JSON.stringify(parseStyleText(staticStyle));
    }
    const styleBinding = getBindingAttr(el, 'style', false /* getStatic */);
    if (styleBinding) {
        el.styleBinding = styleBinding;
    }
}
function genData$1(el) {
    let data = '';
    if (el.staticStyle) {
        data += `staticStyle:${el.staticStyle},`;
    }
    if (el.styleBinding) {
        data += `style:(${el.styleBinding}),`;
    }
    return data;
}
var style = {
    staticKeys: ['staticStyle'],
    transformNode,
    genData: genData$1
};

/**
 * Cross-platform code generation for component v-model
 */
function genComponentModel(el, value, modifiers) {
    const { number, trim } = modifiers || {};
    const baseValueExpression = '$$v';
    let valueExpression = baseValueExpression;
    if (trim) {
        valueExpression =
            `(typeof ${baseValueExpression} === 'string'` +
                `? ${baseValueExpression}.trim()` +
                `: ${baseValueExpression})`;
    }
    if (number) {
        valueExpression = `_n(${valueExpression})`;
    }
    const assignment = genAssignmentCode(value, valueExpression);
    el.model = {
        value: `(${value})`,
        expression: JSON.stringify(value),
        callback: `function (${baseValueExpression}) {${assignment}}`
    };
}
/**
 * Cross-platform codegen helper for generating v-model value assignment code.
 */
function genAssignmentCode(value, assignment) {
    const res = parseModel(value);
    if (res.key === null) {
        return `${value}=${assignment}`;
    }
    else {
        return `$set(${res.exp}, ${res.key}, ${assignment})`;
    }
}
/**
 * Parse a v-model expression into a base path and a final key segment.
 * Handles both dot-path and possible square brackets.
 *
 * Possible cases:
 *
 * - test
 * - test[key]
 * - test[test1[key]]
 * - test["a"][key]
 * - xxx.test[a[a].test1[key]]
 * - test.xxx.a["asa"][test1[key]]
 *
 */
let len, str, chr, index, expressionPos, expressionEndPos;
function parseModel(val) {
    // Fix https://github.com/vuejs/vue/pull/7730
    // allow v-model="obj.val " (trailing whitespace)
    val = val.trim();
    len = val.length;
    if (val.indexOf('[') < 0 || val.lastIndexOf(']') < len - 1) {
        index = val.lastIndexOf('.');
        if (index > -1) {
            return {
                exp: val.slice(0, index),
                key: '"' + val.slice(index + 1) + '"'
            };
        }
        else {
            return {
                exp: val,
                key: null
            };
        }
    }
    str = val;
    index = expressionPos = expressionEndPos = 0;
    while (!eof()) {
        chr = next();
        /* istanbul ignore if */
        if (isStringStart(chr)) {
            parseString(chr);
        }
        else if (chr === 0x5b) {
            parseBracket(chr);
        }
    }
    return {
        exp: val.slice(0, expressionPos),
        key: val.slice(expressionPos + 1, expressionEndPos)
    };
}
function next() {
    return str.charCodeAt(++index);
}
function eof() {
    return index >= len;
}
function isStringStart(chr) {
    return chr === 0x22 || chr === 0x27;
}
function parseBracket(chr) {
    let inBracket = 1;
    expressionPos = index;
    while (!eof()) {
        chr = next();
        if (isStringStart(chr)) {
            parseString(chr);
            continue;
        }
        if (chr === 0x5b)
            inBracket++;
        if (chr === 0x5d)
            inBracket--;
        if (inBracket === 0) {
            expressionEndPos = index;
            break;
        }
    }
}
function parseString(chr) {
    const stringQuote = chr;
    while (!eof()) {
        chr = next();
        if (chr === stringQuote) {
            break;
        }
    }
}

const onRE = /^@|^v-on:/;
const dirRE = /^v-|^@|^:|^#/;
const forAliasRE = /([\s\S]*?)\s+(?:in|of)\s+([\s\S]*)/;
const forIteratorRE = /,([^,\}\]]*)(?:,([^,\}\]]*))?$/;
const stripParensRE = /^\(|\)$/g;
const dynamicArgRE = /^\[.*\]$/;
const argRE = /:(.*)$/;
const bindRE = /^:|^\.|^v-bind:/;
const modifierRE = /\.[^.\]]+(?=[^\]]*$)/g;
const slotRE = /^v-slot(:|$)|^#/;
const lineBreakRE = /[\r\n]/;
const whitespaceRE = /[ \f\t\r\n]+/g;
const invalidAttributeRE = /[\s"'<>\/=]/;
const decodeHTMLCached = cached(he__default["default"].decode);
const emptySlotScopeToken = `_empty_`;
// configurable state
let warn$1;
let delimiters;
let transforms;
let preTransforms;
let postTransforms;
let platformIsPreTag;
let platformMustUseProp;
let platformGetTagNamespace;
let maybeComponent;
function createASTElement(tag, attrs, parent) {
    return {
        type: 1,
        tag,
        attrsList: attrs,
        attrsMap: makeAttrsMap(attrs),
        rawAttrsMap: {},
        parent,
        children: []
    };
}
/**
 * Convert HTML string to AST.
 */
function parse(template, options) {
    warn$1 = options.warn || baseWarn;
    platformIsPreTag = options.isPreTag || no;
    platformMustUseProp = options.mustUseProp || no;
    platformGetTagNamespace = options.getTagNamespace || no;
    const isReservedTag = options.isReservedTag || no;
    maybeComponent = (el) => !!(el.component ||
        el.attrsMap[':is'] ||
        el.attrsMap['v-bind:is'] ||
        !(el.attrsMap.is ? isReservedTag(el.attrsMap.is) : isReservedTag(el.tag)));
    transforms = pluckModuleFunction(options.modules, 'transformNode');
    preTransforms = pluckModuleFunction(options.modules, 'preTransformNode');
    postTransforms = pluckModuleFunction(options.modules, 'postTransformNode');
    delimiters = options.delimiters;
    const stack = [];
    const preserveWhitespace = options.preserveWhitespace !== false;
    const whitespaceOption = options.whitespace;
    let root;
    let currentParent;
    let inVPre = false;
    let inPre = false;
    let warned = false;
    function warnOnce(msg, range) {
        if (!warned) {
            warned = true;
            warn$1(msg, range);
        }
    }
    function closeElement(element) {
        trimEndingWhitespace(element);
        if (!inVPre && !element.processed) {
            element = processElement(element, options);
        }
        // tree management
        if (!stack.length && element !== root) {
            // allow root elements with v-if, v-else-if and v-else
            if (root.if && (element.elseif || element.else)) {
                if (process.env.NODE_ENV !== 'production') {
                    checkRootConstraints(element);
                }
                addIfCondition(root, {
                    exp: element.elseif,
                    block: element
                });
            }
            else if (process.env.NODE_ENV !== 'production') {
                warnOnce(`Component template should contain exactly one root element. ` +
                    `If you are using v-if on multiple elements, ` +
                    `use v-else-if to chain them instead.`, { start: element.start });
            }
        }
        if (currentParent && !element.forbidden) {
            if (element.elseif || element.else) {
                processIfConditions(element, currentParent);
            }
            else {
                if (element.slotScope) {
                    // scoped slot
                    // keep it in the children list so that v-else(-if) conditions can
                    // find it as the prev node.
                    const name = element.slotTarget || '"default"';
                    (currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element;
                }
                currentParent.children.push(element);
                element.parent = currentParent;
            }
        }
        // final children cleanup
        // filter out scoped slots
        element.children = element.children.filter(c => !c.slotScope);
        // remove trailing whitespace node again
        trimEndingWhitespace(element);
        // check pre state
        if (element.pre) {
            inVPre = false;
        }
        if (platformIsPreTag(element.tag)) {
            inPre = false;
        }
        // apply post-transforms
        for (let i = 0; i < postTransforms.length; i++) {
            postTransforms[i](element, options);
        }
    }
    function trimEndingWhitespace(el) {
        // remove trailing whitespace node
        if (!inPre) {
            let lastNode;
            while ((lastNode = el.children[el.children.length - 1]) &&
                lastNode.type === 3 &&
                lastNode.text === ' ') {
                el.children.pop();
            }
        }
    }
    function checkRootConstraints(el) {
        if (el.tag === 'slot' || el.tag === 'template') {
            warnOnce(`Cannot use <${el.tag}> as component root element because it may ` +
                'contain multiple nodes.', { start: el.start });
        }
        if (el.attrsMap.hasOwnProperty('v-for')) {
            warnOnce('Cannot use v-for on stateful component root element because ' +
                'it renders multiple elements.', el.rawAttrsMap['v-for']);
        }
    }
    parseHTML(template, {
        warn: warn$1,
        expectHTML: options.expectHTML,
        isUnaryTag: options.isUnaryTag,
        canBeLeftOpenTag: options.canBeLeftOpenTag,
        shouldDecodeNewlines: options.shouldDecodeNewlines,
        shouldDecodeNewlinesForHref: options.shouldDecodeNewlinesForHref,
        shouldKeepComment: options.comments,
        outputSourceRange: options.outputSourceRange,
        start(tag, attrs, unary, start, end) {
            // check namespace.
            // inherit parent ns if there is one
            const ns = (currentParent && currentParent.ns) || platformGetTagNamespace(tag);
            // handle IE svg bug
            /* istanbul ignore if */
            if (isIE && ns === 'svg') {
                attrs = guardIESVGBug(attrs);
            }
            let element = createASTElement(tag, attrs, currentParent);
            if (ns) {
                element.ns = ns;
            }
            if (process.env.NODE_ENV !== 'production') {
                if (options.outputSourceRange) {
                    element.start = start;
                    element.end = end;
                    element.rawAttrsMap = element.attrsList.reduce((cumulated, attr) => {
                        cumulated[attr.name] = attr;
                        return cumulated;
                    }, {});
                }
                attrs.forEach(attr => {
                    if (invalidAttributeRE.test(attr.name)) {
                        warn$1(`Invalid dynamic argument expression: attribute names cannot contain ` +
                            `spaces, quotes, <, >, / or =.`, options.outputSourceRange
                            ? {
                                start: attr.start + attr.name.indexOf(`[`),
                                end: attr.start + attr.name.length
                            }
                            : undefined);
                    }
                });
            }
            if (isForbiddenTag(element) && !isServerRendering()) {
                element.forbidden = true;
                process.env.NODE_ENV !== 'production' &&
                    warn$1('Templates should only be responsible for mapping the state to the ' +
                        'UI. Avoid placing tags with side-effects in your templates, such as ' +
                        `<${tag}>` +
                        ', as they will not be parsed.', { start: element.start });
            }
            // apply pre-transforms
            for (let i = 0; i < preTransforms.length; i++) {
                element = preTransforms[i](element, options) || element;
            }
            if (!inVPre) {
                processPre(element);
                if (element.pre) {
                    inVPre = true;
                }
            }
            if (platformIsPreTag(element.tag)) {
                inPre = true;
            }
            if (inVPre) {
                processRawAttrs(element);
            }
            else if (!element.processed) {
                // structural directives
                processFor(element);
                processIf(element);
                processOnce(element);
            }
            if (!root) {
                root = element;
                if (process.env.NODE_ENV !== 'production') {
                    checkRootConstraints(root);
                }
            }
            if (!unary) {
                currentParent = element;
                stack.push(element);
            }
            else {
                closeElement(element);
            }
        },
        end(tag, start, end) {
            const element = stack[stack.length - 1];
            // pop stack
            stack.length -= 1;
            currentParent = stack[stack.length - 1];
            if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
                element.end = end;
            }
            closeElement(element);
        },
        chars(text, start, end) {
            if (!currentParent) {
                if (process.env.NODE_ENV !== 'production') {
                    if (text === template) {
                        warnOnce('Component template requires a root element, rather than just text.', { start });
                    }
                    else if ((text = text.trim())) {
                        warnOnce(`text "${text}" outside root element will be ignored.`, {
                            start
                        });
                    }
                }
                return;
            }
            // IE textarea placeholder bug
            /* istanbul ignore if */
            if (isIE &&
                currentParent.tag === 'textarea' &&
                currentParent.attrsMap.placeholder === text) {
                return;
            }
            const children = currentParent.children;
            if (inPre || text.trim()) {
                text = isTextTag(currentParent)
                    ? text
                    : decodeHTMLCached(text);
            }
            else if (!children.length) {
                // remove the whitespace-only node right after an opening tag
                text = '';
            }
            else if (whitespaceOption) {
                if (whitespaceOption === 'condense') {
                    // in condense mode, remove the whitespace node if it contains
                    // line break, otherwise condense to a single space
                    text = lineBreakRE.test(text) ? '' : ' ';
                }
                else {
                    text = ' ';
                }
            }
            else {
                text = preserveWhitespace ? ' ' : '';
            }
            if (text) {
                if (!inPre && whitespaceOption === 'condense') {
                    // condense consecutive whitespaces into single space
                    text = text.replace(whitespaceRE, ' ');
                }
                let res;
                let child;
                if (!inVPre && text !== ' ' && (res = parseText(text, delimiters))) {
                    child = {
                        type: 2,
                        expression: res.expression,
                        tokens: res.tokens,
                        text
                    };
                }
                else if (text !== ' ' ||
                    !children.length ||
                    children[children.length - 1].text !== ' ') {
                    child = {
                        type: 3,
                        text
                    };
                }
                if (child) {
                    if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
                        child.start = start;
                        child.end = end;
                    }
                    children.push(child);
                }
            }
        },
        comment(text, start, end) {
            // adding anything as a sibling to the root node is forbidden
            // comments should still be allowed, but ignored
            if (currentParent) {
                const child = {
                    type: 3,
                    text,
                    isComment: true
                };
                if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
                    child.start = start;
                    child.end = end;
                }
                currentParent.children.push(child);
            }
        }
    });
    return root;
}
function processPre(el) {
    if (getAndRemoveAttr(el, 'v-pre') != null) {
        el.pre = true;
    }
}
function processRawAttrs(el) {
    const list = el.attrsList;
    const len = list.length;
    if (len) {
        const attrs = (el.attrs = new Array(len));
        for (let i = 0; i < len; i++) {
            attrs[i] = {
                name: list[i].name,
                value: JSON.stringify(list[i].value)
            };
            if (list[i].start != null) {
                attrs[i].start = list[i].start;
                attrs[i].end = list[i].end;
            }
        }
    }
    else if (!el.pre) {
        // non root node in pre blocks with no attributes
        el.plain = true;
    }
}
function processElement(element, options) {
    processKey(element);
    // determine whether this is a plain element after
    // removing structural attributes
    element.plain =
        !element.key && !element.scopedSlots && !element.attrsList.length;
    processRef(element);
    processSlotContent(element);
    processSlotOutlet(element);
    processComponent(element);
    for (let i = 0; i < transforms.length; i++) {
        element = transforms[i](element, options) || element;
    }
    processAttrs(element);
    return element;
}
function processKey(el) {
    const exp = getBindingAttr(el, 'key');
    if (exp) {
        if (process.env.NODE_ENV !== 'production') {
            if (el.tag === 'template') {
                warn$1(`<template> cannot be keyed. Place the key on real elements instead.`, getRawBindingAttr(el, 'key'));
            }
            if (el.for) {
                const iterator = el.iterator2 || el.iterator1;
                const parent = el.parent;
                if (iterator &&
                    iterator === exp &&
                    parent &&
                    parent.tag === 'transition-group') {
                    warn$1(`Do not use v-for index as key on <transition-group> children, ` +
                        `this is the same as not using keys.`, getRawBindingAttr(el, 'key'), true /* tip */);
                }
            }
        }
        el.key = exp;
    }
}
function processRef(el) {
    const ref = getBindingAttr(el, 'ref');
    if (ref) {
        el.ref = ref;
        el.refInFor = checkInFor(el);
    }
}
function processFor(el) {
    let exp;
    if ((exp = getAndRemoveAttr(el, 'v-for'))) {
        const res = parseFor(exp);
        if (res) {
            extend(el, res);
        }
        else if (process.env.NODE_ENV !== 'production') {
            warn$1(`Invalid v-for expression: ${exp}`, el.rawAttrsMap['v-for']);
        }
    }
}
function parseFor(exp) {
    const inMatch = exp.match(forAliasRE);
    if (!inMatch)
        return;
    const res = {};
    res.for = inMatch[2].trim();
    const alias = inMatch[1].trim().replace(stripParensRE, '');
    const iteratorMatch = alias.match(forIteratorRE);
    if (iteratorMatch) {
        res.alias = alias.replace(forIteratorRE, '').trim();
        res.iterator1 = iteratorMatch[1].trim();
        if (iteratorMatch[2]) {
            res.iterator2 = iteratorMatch[2].trim();
        }
    }
    else {
        res.alias = alias;
    }
    return res;
}
function processIf(el) {
    const exp = getAndRemoveAttr(el, 'v-if');
    if (exp) {
        el.if = exp;
        addIfCondition(el, {
            exp: exp,
            block: el
        });
    }
    else {
        if (getAndRemoveAttr(el, 'v-else') != null) {
            el.else = true;
        }
        const elseif = getAndRemoveAttr(el, 'v-else-if');
        if (elseif) {
            el.elseif = elseif;
        }
    }
}
function processIfConditions(el, parent) {
    const prev = findPrevElement(parent.children);
    if (prev && prev.if) {
        addIfCondition(prev, {
            exp: el.elseif,
            block: el
        });
    }
    else if (process.env.NODE_ENV !== 'production') {
        warn$1(`v-${el.elseif ? 'else-if="' + el.elseif + '"' : 'else'} ` +
            `used on element <${el.tag}> without corresponding v-if.`, el.rawAttrsMap[el.elseif ? 'v-else-if' : 'v-else']);
    }
}
function findPrevElement(children) {
    let i = children.length;
    while (i--) {
        if (children[i].type === 1) {
            return children[i];
        }
        else {
            if (process.env.NODE_ENV !== 'production' && children[i].text !== ' ') {
                warn$1(`text "${children[i].text.trim()}" between v-if and v-else(-if) ` +
                    `will be ignored.`, children[i]);
            }
            children.pop();
        }
    }
}
function addIfCondition(el, condition) {
    if (!el.ifConditions) {
        el.ifConditions = [];
    }
    el.ifConditions.push(condition);
}
function processOnce(el) {
    const once = getAndRemoveAttr(el, 'v-once');
    if (once != null) {
        el.once = true;
    }
}
// handle content being passed to a component as slot,
// e.g. <template slot="xxx">, <div slot-scope="xxx">
function processSlotContent(el) {
    let slotScope;
    if (el.tag === 'template') {
        slotScope = getAndRemoveAttr(el, 'scope');
        /* istanbul ignore if */
        if (process.env.NODE_ENV !== 'production' && slotScope) {
            warn$1(`the "scope" attribute for scoped slots have been deprecated and ` +
                `replaced by "slot-scope" since 2.5. The new "slot-scope" attribute ` +
                `can also be used on plain elements in addition to <template> to ` +
                `denote scoped slots.`, el.rawAttrsMap['scope'], true);
        }
        el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
    }
    else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
        /* istanbul ignore if */
        if (process.env.NODE_ENV !== 'production' && el.attrsMap['v-for']) {
            warn$1(`Ambiguous combined usage of slot-scope and v-for on <${el.tag}> ` +
                `(v-for takes higher priority). Use a wrapper <template> for the ` +
                `scoped slot to make it clearer.`, el.rawAttrsMap['slot-scope'], true);
        }
        el.slotScope = slotScope;
    }
    // slot="xxx"
    const slotTarget = getBindingAttr(el, 'slot');
    if (slotTarget) {
        el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget;
        el.slotTargetDynamic = !!(el.attrsMap[':slot'] || el.attrsMap['v-bind:slot']);
        // preserve slot as an attribute for native shadow DOM compat
        // only for non-scoped slots.
        if (el.tag !== 'template' && !el.slotScope) {
            addAttr(el, 'slot', slotTarget, getRawBindingAttr(el, 'slot'));
        }
    }
    // 2.6 v-slot syntax
    {
        if (el.tag === 'template') {
            // v-slot on <template>
            const slotBinding = getAndRemoveAttrByRegex(el, slotRE);
            if (slotBinding) {
                if (process.env.NODE_ENV !== 'production') {
                    if (el.slotTarget || el.slotScope) {
                        warn$1(`Unexpected mixed usage of different slot syntaxes.`, el);
                    }
                    if (el.parent && !maybeComponent(el.parent)) {
                        warn$1(`<template v-slot> can only appear at the root level inside ` +
                            `the receiving component`, el);
                    }
                }
                const { name, dynamic } = getSlotName(slotBinding);
                el.slotTarget = name;
                el.slotTargetDynamic = dynamic;
                el.slotScope = slotBinding.value || emptySlotScopeToken; // force it into a scoped slot for perf
            }
        }
        else {
            // v-slot on component, denotes default slot
            const slotBinding = getAndRemoveAttrByRegex(el, slotRE);
            if (slotBinding) {
                if (process.env.NODE_ENV !== 'production') {
                    if (!maybeComponent(el)) {
                        warn$1(`v-slot can only be used on components or <template>.`, slotBinding);
                    }
                    if (el.slotScope || el.slotTarget) {
                        warn$1(`Unexpected mixed usage of different slot syntaxes.`, el);
                    }
                    if (el.scopedSlots) {
                        warn$1(`To avoid scope ambiguity, the default slot should also use ` +
                            `<template> syntax when there are other named slots.`, slotBinding);
                    }
                }
                // add the component's children to its default slot
                const slots = el.scopedSlots || (el.scopedSlots = {});
                const { name, dynamic } = getSlotName(slotBinding);
                const slotContainer = (slots[name] = createASTElement('template', [], el));
                slotContainer.slotTarget = name;
                slotContainer.slotTargetDynamic = dynamic;
                slotContainer.children = el.children.filter((c) => {
                    if (!c.slotScope) {
                        c.parent = slotContainer;
                        return true;
                    }
                });
                slotContainer.slotScope = slotBinding.value || emptySlotScopeToken;
                // remove children as they are returned from scopedSlots now
                el.children = [];
                // mark el non-plain so data gets generated
                el.plain = false;
            }
        }
    }
}
function getSlotName(binding) {
    let name = binding.name.replace(slotRE, '');
    if (!name) {
        if (binding.name[0] !== '#') {
            name = 'default';
        }
        else if (process.env.NODE_ENV !== 'production') {
            warn$1(`v-slot shorthand syntax requires a slot name.`, binding);
        }
    }
    return dynamicArgRE.test(name)
        ? // dynamic [name]
            { name: name.slice(1, -1), dynamic: true }
        : // static name
            { name: `"${name}"`, dynamic: false };
}
// handle <slot/> outlets
function processSlotOutlet(el) {
    if (el.tag === 'slot') {
        el.slotName = getBindingAttr(el, 'name');
        if (process.env.NODE_ENV !== 'production' && el.key) {
            warn$1(`\`key\` does not work on <slot> because slots are abstract outlets ` +
                `and can possibly expand into multiple elements. ` +
                `Use the key on a wrapping element instead.`, getRawBindingAttr(el, 'key'));
        }
    }
}
function processComponent(el) {
    let binding;
    if ((binding = getBindingAttr(el, 'is'))) {
        el.component = binding;
    }
    if (getAndRemoveAttr(el, 'inline-template') != null) {
        el.inlineTemplate = true;
    }
}
function processAttrs(el) {
    const list = el.attrsList;
    let i, l, name, rawName, value, modifiers, syncGen, isDynamic;
    for (i = 0, l = list.length; i < l; i++) {
        name = rawName = list[i].name;
        value = list[i].value;
        if (dirRE.test(name)) {
            // mark element as dynamic
            el.hasBindings = true;
            // modifiers
            modifiers = parseModifiers(name.replace(dirRE, ''));
            // support .foo shorthand syntax for the .prop modifier
            if (modifiers) {
                name = name.replace(modifierRE, '');
            }
            if (bindRE.test(name)) {
                // v-bind
                name = name.replace(bindRE, '');
                value = parseFilters(value);
                isDynamic = dynamicArgRE.test(name);
                if (isDynamic) {
                    name = name.slice(1, -1);
                }
                if (process.env.NODE_ENV !== 'production' && value.trim().length === 0) {
                    warn$1(`The value for a v-bind expression cannot be empty. Found in "v-bind:${name}"`);
                }
                if (modifiers) {
                    if (modifiers.prop && !isDynamic) {
                        name = camelize(name);
                        if (name === 'innerHtml')
                            name = 'innerHTML';
                    }
                    if (modifiers.camel && !isDynamic) {
                        name = camelize(name);
                    }
                    if (modifiers.sync) {
                        syncGen = genAssignmentCode(value, `$event`);
                        if (!isDynamic) {
                            addHandler(el, `update:${camelize(name)}`, syncGen, null, false, warn$1, list[i]);
                            if (hyphenate(name) !== camelize(name)) {
                                addHandler(el, `update:${hyphenate(name)}`, syncGen, null, false, warn$1, list[i]);
                            }
                        }
                        else {
                            // handler w/ dynamic event name
                            addHandler(el, `"update:"+(${name})`, syncGen, null, false, warn$1, list[i], true // dynamic
                            );
                        }
                    }
                }
                if ((modifiers && modifiers.prop) ||
                    (!el.component && platformMustUseProp(el.tag, el.attrsMap.type, name))) {
                    addProp(el, name, value, list[i], isDynamic);
                }
                else {
                    addAttr(el, name, value, list[i], isDynamic);
                }
            }
            else if (onRE.test(name)) {
                // v-on
                name = name.replace(onRE, '');
                isDynamic = dynamicArgRE.test(name);
                if (isDynamic) {
                    name = name.slice(1, -1);
                }
                addHandler(el, name, value, modifiers, false, warn$1, list[i], isDynamic);
            }
            else {
                // normal directives
                name = name.replace(dirRE, '');
                // parse arg
                const argMatch = name.match(argRE);
                let arg = argMatch && argMatch[1];
                isDynamic = false;
                if (arg) {
                    name = name.slice(0, -(arg.length + 1));
                    if (dynamicArgRE.test(arg)) {
                        arg = arg.slice(1, -1);
                        isDynamic = true;
                    }
                }
                addDirective(el, name, rawName, value, arg, isDynamic, modifiers, list[i]);
                if (process.env.NODE_ENV !== 'production' && name === 'model') {
                    checkForAliasModel(el, value);
                }
            }
        }
        else {
            // literal attribute
            if (process.env.NODE_ENV !== 'production') {
                const res = parseText(value, delimiters);
                if (res) {
                    warn$1(`${name}="${value}": ` +
                        'Interpolation inside attributes has been removed. ' +
                        'Use v-bind or the colon shorthand instead. For example, ' +
                        'instead of <div id="{{ val }}">, use <div :id="val">.', list[i]);
                }
            }
            addAttr(el, name, JSON.stringify(value), list[i]);
            // #6887 firefox doesn't update muted state if set via attribute
            // even immediately after element creation
            if (!el.component &&
                name === 'muted' &&
                platformMustUseProp(el.tag, el.attrsMap.type, name)) {
                addProp(el, name, 'true', list[i]);
            }
        }
    }
}
function checkInFor(el) {
    let parent = el;
    while (parent) {
        if (parent.for !== undefined) {
            return true;
        }
        parent = parent.parent;
    }
    return false;
}
function parseModifiers(name) {
    const match = name.match(modifierRE);
    if (match) {
        const ret = {};
        match.forEach(m => {
            ret[m.slice(1)] = true;
        });
        return ret;
    }
}
function makeAttrsMap(attrs) {
    const map = {};
    for (let i = 0, l = attrs.length; i < l; i++) {
        if (process.env.NODE_ENV !== 'production' && map[attrs[i].name] && !isIE && !isEdge) {
            warn$1('duplicate attribute: ' + attrs[i].name, attrs[i]);
        }
        map[attrs[i].name] = attrs[i].value;
    }
    return map;
}
// for script (e.g. type="x/template") or style, do not decode content
function isTextTag(el) {
    return el.tag === 'script' || el.tag === 'style';
}
function isForbiddenTag(el) {
    return (el.tag === 'style' ||
        (el.tag === 'script' &&
            (!el.attrsMap.type || el.attrsMap.type === 'text/javascript')));
}
const ieNSBug = /^xmlns:NS\d+/;
const ieNSPrefix = /^NS\d+:/;
/* istanbul ignore next */
function guardIESVGBug(attrs) {
    const res = [];
    for (let i = 0; i < attrs.length; i++) {
        const attr = attrs[i];
        if (!ieNSBug.test(attr.name)) {
            attr.name = attr.name.replace(ieNSPrefix, '');
            res.push(attr);
        }
    }
    return res;
}
function checkForAliasModel(el, value) {
    let _el = el;
    while (_el) {
        if (_el.for && _el.alias === value) {
            warn$1(`<${el.tag} v-model="${value}">: ` +
                `You are binding v-model directly to a v-for iteration alias. ` +
                `This will not be able to modify the v-for source array because ` +
                `writing to the alias is like modifying a function local variable. ` +
                `Consider using an array of objects and use v-model on an object property instead.`, el.rawAttrsMap['v-model']);
        }
        _el = _el.parent;
    }
}

/**
 * Expand input[v-model] with dynamic type bindings into v-if-else chains
 * Turn this:
 *   <input v-model="data[type]" :type="type">
 * into this:
 *   <input v-if="type === 'checkbox'" type="checkbox" v-model="data[type]">
 *   <input v-else-if="type === 'radio'" type="radio" v-model="data[type]">
 *   <input v-else :type="type" v-model="data[type]">
 */
function preTransformNode(el, options) {
    if (el.tag === 'input') {
        const map = el.attrsMap;
        if (!map['v-model']) {
            return;
        }
        let typeBinding;
        if (map[':type'] || map['v-bind:type']) {
            typeBinding = getBindingAttr(el, 'type');
        }
        if (!map.type && !typeBinding && map['v-bind']) {
            typeBinding = `(${map['v-bind']}).type`;
        }
        if (typeBinding) {
            const ifCondition = getAndRemoveAttr(el, 'v-if', true);
            const ifConditionExtra = ifCondition ? `&&(${ifCondition})` : ``;
            const hasElse = getAndRemoveAttr(el, 'v-else', true) != null;
            const elseIfCondition = getAndRemoveAttr(el, 'v-else-if', true);
            // 1. checkbox
            const branch0 = cloneASTElement(el);
            // process for on the main node
            processFor(branch0);
            addRawAttr(branch0, 'type', 'checkbox');
            processElement(branch0, options);
            branch0.processed = true; // prevent it from double-processed
            branch0.if = `(${typeBinding})==='checkbox'` + ifConditionExtra;
            addIfCondition(branch0, {
                exp: branch0.if,
                block: branch0
            });
            // 2. add radio else-if condition
            const branch1 = cloneASTElement(el);
            getAndRemoveAttr(branch1, 'v-for', true);
            addRawAttr(branch1, 'type', 'radio');
            processElement(branch1, options);
            addIfCondition(branch0, {
                exp: `(${typeBinding})==='radio'` + ifConditionExtra,
                block: branch1
            });
            // 3. other
            const branch2 = cloneASTElement(el);
            getAndRemoveAttr(branch2, 'v-for', true);
            addRawAttr(branch2, ':type', typeBinding);
            processElement(branch2, options);
            addIfCondition(branch0, {
                exp: ifCondition,
                block: branch2
            });
            if (hasElse) {
                branch0.else = true;
            }
            else if (elseIfCondition) {
                branch0.elseif = elseIfCondition;
            }
            return branch0;
        }
    }
}
function cloneASTElement(el) {
    return createASTElement(el.tag, el.attrsList.slice(), el.parent);
}
var model$1 = {
    preTransformNode
};

var modules = [klass, style, model$1];

let warn;
// in some cases, the event used has to be determined at runtime
// so we used some reserved tokens during compile.
const RANGE_TOKEN = '__r';
function model(el, dir, _warn) {
    warn = _warn;
    const value = dir.value;
    const modifiers = dir.modifiers;
    const tag = el.tag;
    const type = el.attrsMap.type;
    if (process.env.NODE_ENV !== 'production') {
        // inputs with type="file" are read only and setting the input's
        // value will throw an error.
        if (tag === 'input' && type === 'file') {
            warn(`<${el.tag} v-model="${value}" type="file">:\n` +
                `File inputs are read only. Use a v-on:change listener instead.`, el.rawAttrsMap['v-model']);
        }
    }
    if (el.component) {
        genComponentModel(el, value, modifiers);
        // component v-model doesn't need extra runtime
        return false;
    }
    else if (tag === 'select') {
        genSelect(el, value, modifiers);
    }
    else if (tag === 'input' && type === 'checkbox') {
        genCheckboxModel(el, value, modifiers);
    }
    else if (tag === 'input' && type === 'radio') {
        genRadioModel(el, value, modifiers);
    }
    else if (tag === 'input' || tag === 'textarea') {
        genDefaultModel(el, value, modifiers);
    }
    else {
        genComponentModel(el, value, modifiers);
        // component v-model doesn't need extra runtime
        return false;
    }
    // ensure runtime directive metadata
    return true;
}
function genCheckboxModel(el, value, modifiers) {
    const number = modifiers && modifiers.number;
    const valueBinding = getBindingAttr(el, 'value') || 'null';
    const trueValueBinding = getBindingAttr(el, 'true-value') || 'true';
    const falseValueBinding = getBindingAttr(el, 'false-value') || 'false';
    addProp(el, 'checked', `Array.isArray(${value})` +
        `?_i(${value},${valueBinding})>-1` +
        (trueValueBinding === 'true'
            ? `:(${value})`
            : `:_q(${value},${trueValueBinding})`));
    addHandler(el, 'change', `var $$a=${value},` +
        '$$el=$event.target,' +
        `$$c=$$el.checked?(${trueValueBinding}):(${falseValueBinding});` +
        'if(Array.isArray($$a)){' +
        `var $$v=${number ? '_n(' + valueBinding + ')' : valueBinding},` +
        '$$i=_i($$a,$$v);' +
        `if($$el.checked){$$i<0&&(${genAssignmentCode(value, '$$a.concat([$$v])')})}` +
        `else{$$i>-1&&(${genAssignmentCode(value, '$$a.slice(0,$$i).concat($$a.slice($$i+1))')})}` +
        `}else{${genAssignmentCode(value, '$$c')}}`, null, true);
}
function genRadioModel(el, value, modifiers) {
    const number = modifiers && modifiers.number;
    let valueBinding = getBindingAttr(el, 'value') || 'null';
    valueBinding = number ? `_n(${valueBinding})` : valueBinding;
    addProp(el, 'checked', `_q(${value},${valueBinding})`);
    addHandler(el, 'change', genAssignmentCode(value, valueBinding), null, true);
}
function genSelect(el, value, modifiers) {
    const number = modifiers && modifiers.number;
    const selectedVal = `Array.prototype.filter` +
        `.call($event.target.options,function(o){return o.selected})` +
        `.map(function(o){var val = "_value" in o ? o._value : o.value;` +
        `return ${number ? '_n(val)' : 'val'}})`;
    const assignment = '$event.target.multiple ? $$selectedVal : $$selectedVal[0]';
    let code = `var $$selectedVal = ${selectedVal};`;
    code = `${code} ${genAssignmentCode(value, assignment)}`;
    addHandler(el, 'change', code, null, true);
}
function genDefaultModel(el, value, modifiers) {
    const type = el.attrsMap.type;
    // warn if v-bind:value conflicts with v-model
    // except for inputs with v-bind:type
    if (process.env.NODE_ENV !== 'production') {
        const value = el.attrsMap['v-bind:value'] || el.attrsMap[':value'];
        const typeBinding = el.attrsMap['v-bind:type'] || el.attrsMap[':type'];
        if (value && !typeBinding) {
            const binding = el.attrsMap['v-bind:value'] ? 'v-bind:value' : ':value';
            warn(`${binding}="${value}" conflicts with v-model on the same element ` +
                'because the latter already expands to a value binding internally', el.rawAttrsMap[binding]);
        }
    }
    const { lazy, number, trim } = modifiers || {};
    const needCompositionGuard = !lazy && type !== 'range';
    const event = lazy ? 'change' : type === 'range' ? RANGE_TOKEN : 'input';
    let valueExpression = '$event.target.value';
    if (trim) {
        valueExpression = `$event.target.value.trim()`;
    }
    if (number) {
        valueExpression = `_n(${valueExpression})`;
    }
    let code = genAssignmentCode(value, valueExpression);
    if (needCompositionGuard) {
        code = `if($event.target.composing)return;${code}`;
    }
    addProp(el, 'value', `(${value})`);
    addHandler(el, event, code, null, true);
    if (trim || number) {
        addHandler(el, 'blur', '$forceUpdate()');
    }
}

function text(el, dir) {
    if (dir.value) {
        addProp(el, 'textContent', `_s(${dir.value})`, dir);
    }
}

function html(el, dir) {
    if (dir.value) {
        addProp(el, 'innerHTML', `_s(${dir.value})`, dir);
    }
}

var directives = {
    model,
    text,
    html
};

const baseOptions = {
    expectHTML: true,
    modules,
    directives,
    isPreTag,
    isUnaryTag,
    mustUseProp,
    canBeLeftOpenTag,
    isReservedTag,
    getTagNamespace,
    staticKeys: genStaticKeys$1(modules)
};

let isStaticKey;
let isPlatformReservedTag$1;
const genStaticKeysCached = cached(genStaticKeys);
/**
 * Goal of the optimizer: walk the generated template AST tree
 * and detect sub-trees that are purely static, i.e. parts of
 * the DOM that never needs to change.
 *
 * Once we detect these sub-trees, we can:
 *
 * 1. Hoist them into constants, so that we no longer need to
 *    create fresh nodes for them on each re-render;
 * 2. Completely skip them in the patching process.
 */
function optimize$1(root, options) {
    if (!root)
        return;
    isStaticKey = genStaticKeysCached(options.staticKeys || '');
    isPlatformReservedTag$1 = options.isReservedTag || no;
    // first pass: mark all non-static nodes.
    markStatic(root);
    // second pass: mark static roots.
    markStaticRoots(root, false);
}
function genStaticKeys(keys) {
    return makeMap('type,tag,attrsList,attrsMap,plain,parent,children,attrs,start,end,rawAttrsMap' +
        (keys ? ',' + keys : ''));
}
function markStatic(node) {
    node.static = isStatic(node);
    if (node.type === 1) {
        // do not make component slot content static. this avoids
        // 1. components not able to mutate slot nodes
        // 2. static slot content fails for hot-reloading
        if (!isPlatformReservedTag$1(node.tag) &&
            node.tag !== 'slot' &&
            node.attrsMap['inline-template'] == null) {
            return;
        }
        for (let i = 0, l = node.children.length; i < l; i++) {
            const child = node.children[i];
            markStatic(child);
            if (!child.static) {
                node.static = false;
            }
        }
        if (node.ifConditions) {
            for (let i = 1, l = node.ifConditions.length; i < l; i++) {
                const block = node.ifConditions[i].block;
                markStatic(block);
                if (!block.static) {
                    node.static = false;
                }
            }
        }
    }
}
function markStaticRoots(node, isInFor) {
    if (node.type === 1) {
        if (node.static || node.once) {
            node.staticInFor = isInFor;
        }
        // For a node to qualify as a static root, it should have children that
        // are not just static text. Otherwise the cost of hoisting out will
        // outweigh the benefits and it's better off to just always render it fresh.
        if (node.static &&
            node.children.length &&
            !(node.children.length === 1 && node.children[0].type === 3)) {
            node.staticRoot = true;
            return;
        }
        else {
            node.staticRoot = false;
        }
        if (node.children) {
            for (let i = 0, l = node.children.length; i < l; i++) {
                markStaticRoots(node.children[i], isInFor || !!node.for);
            }
        }
        if (node.ifConditions) {
            for (let i = 1, l = node.ifConditions.length; i < l; i++) {
                markStaticRoots(node.ifConditions[i].block, isInFor);
            }
        }
    }
}
function isStatic(node) {
    if (node.type === 2) {
        // expression
        return false;
    }
    if (node.type === 3) {
        // text
        return true;
    }
    return !!(node.pre ||
        (!node.hasBindings && // no dynamic bindings
            !node.if &&
            !node.for && // not v-if or v-for or v-else
            !isBuiltInTag(node.tag) && // not a built-in
            isPlatformReservedTag$1(node.tag) && // not a component
            !isDirectChildOfTemplateFor(node) &&
            Object.keys(node).every(isStaticKey)));
}
function isDirectChildOfTemplateFor(node) {
    while (node.parent) {
        node = node.parent;
        if (node.tag !== 'template') {
            return false;
        }
        if (node.for) {
            return true;
        }
    }
    return false;
}

const fnExpRE = /^([\w$_]+|\([^)]*?\))\s*=>|^function(?:\s+[\w$]+)?\s*\(/;
const fnInvokeRE = /\([^)]*?\);*$/;
const simplePathRE = /^[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['[^']*?']|\["[^"]*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*$/;
// KeyboardEvent.keyCode aliases
const keyCodes = {
    esc: 27,
    tab: 9,
    enter: 13,
    space: 32,
    up: 38,
    left: 37,
    right: 39,
    down: 40,
    delete: [8, 46]
};
// KeyboardEvent.key aliases
const keyNames = {
    // #7880: IE11 and Edge use `Esc` for Escape key name.
    esc: ['Esc', 'Escape'],
    tab: 'Tab',
    enter: 'Enter',
    // #9112: IE11 uses `Spacebar` for Space key name.
    space: [' ', 'Spacebar'],
    // #7806: IE11 uses key names without `Arrow` prefix for arrow keys.
    up: ['Up', 'ArrowUp'],
    left: ['Left', 'ArrowLeft'],
    right: ['Right', 'ArrowRight'],
    down: ['Down', 'ArrowDown'],
    // #9112: IE11 uses `Del` for Delete key name.
    delete: ['Backspace', 'Delete', 'Del']
};
// #4868: modifiers that prevent the execution of the listener
// need to explicitly return null so that we can determine whether to remove
// the listener for .once
const genGuard = condition => `if(${condition})return null;`;
const modifierCode = {
    stop: '$event.stopPropagation();',
    prevent: '$event.preventDefault();',
    self: genGuard(`$event.target !== $event.currentTarget`),
    ctrl: genGuard(`!$event.ctrlKey`),
    shift: genGuard(`!$event.shiftKey`),
    alt: genGuard(`!$event.altKey`),
    meta: genGuard(`!$event.metaKey`),
    left: genGuard(`'button' in $event && $event.button !== 0`),
    middle: genGuard(`'button' in $event && $event.button !== 1`),
    right: genGuard(`'button' in $event && $event.button !== 2`)
};
function genHandlers(events, isNative) {
    const prefix = isNative ? 'nativeOn:' : 'on:';
    let staticHandlers = ``;
    let dynamicHandlers = ``;
    for (const name in events) {
        const handlerCode = genHandler(events[name]);
        //@ts-expect-error
        if (events[name] && events[name].dynamic) {
            dynamicHandlers += `${name},${handlerCode},`;
        }
        else {
            staticHandlers += `"${name}":${handlerCode},`;
        }
    }
    staticHandlers = `{${staticHandlers.slice(0, -1)}}`;
    if (dynamicHandlers) {
        return prefix + `_d(${staticHandlers},[${dynamicHandlers.slice(0, -1)}])`;
    }
    else {
        return prefix + staticHandlers;
    }
}
function genHandler(handler) {
    if (!handler) {
        return 'function(){}';
    }
    if (Array.isArray(handler)) {
        return `[${handler.map(handler => genHandler(handler)).join(',')}]`;
    }
    const isMethodPath = simplePathRE.test(handler.value);
    const isFunctionExpression = fnExpRE.test(handler.value);
    const isFunctionInvocation = simplePathRE.test(handler.value.replace(fnInvokeRE, ''));
    if (!handler.modifiers) {
        if (isMethodPath || isFunctionExpression) {
            return handler.value;
        }
        return `function($event){${isFunctionInvocation ? `return ${handler.value}` : handler.value}}`; // inline statement
    }
    else {
        let code = '';
        let genModifierCode = '';
        const keys = [];
        for (const key in handler.modifiers) {
            if (modifierCode[key]) {
                genModifierCode += modifierCode[key];
                // left/right
                if (keyCodes[key]) {
                    keys.push(key);
                }
            }
            else if (key === 'exact') {
                const modifiers = handler.modifiers;
                genModifierCode += genGuard(['ctrl', 'shift', 'alt', 'meta']
                    .filter(keyModifier => !modifiers[keyModifier])
                    .map(keyModifier => `$event.${keyModifier}Key`)
                    .join('||'));
            }
            else {
                keys.push(key);
            }
        }
        if (keys.length) {
            code += genKeyFilter(keys);
        }
        // Make sure modifiers like prevent and stop get executed after key filtering
        if (genModifierCode) {
            code += genModifierCode;
        }
        const handlerCode = isMethodPath
            ? `return ${handler.value}.apply(null, arguments)`
            : isFunctionExpression
                ? `return (${handler.value}).apply(null, arguments)`
                : isFunctionInvocation
                    ? `return ${handler.value}`
                    : handler.value;
        return `function($event){${code}${handlerCode}}`;
    }
}
function genKeyFilter(keys) {
    return (
    // make sure the key filters only apply to KeyboardEvents
    // #9441: can't use 'keyCode' in $event because Chrome autofill fires fake
    // key events that do not have keyCode property...
    `if(!$event.type.indexOf('key')&&` +
        `${keys.map(genFilterCode).join('&&')})return null;`);
}
function genFilterCode(key) {
    const keyVal = parseInt(key, 10);
    if (keyVal) {
        return `$event.keyCode!==${keyVal}`;
    }
    const keyCode = keyCodes[key];
    const keyName = keyNames[key];
    return (`_k($event.keyCode,` +
        `${JSON.stringify(key)},` +
        `${JSON.stringify(keyCode)},` +
        `$event.key,` +
        `${JSON.stringify(keyName)}` +
        `)`);
}

function on(el, dir) {
    if (process.env.NODE_ENV !== 'production' && dir.modifiers) {
        warn$2(`v-on without argument does not support modifiers.`);
    }
    el.wrapListeners = (code) => `_g(${code},${dir.value})`;
}

function bind(el, dir) {
    el.wrapData = (code) => {
        return `_b(${code},'${el.tag}',${dir.value},${dir.modifiers && dir.modifiers.prop ? 'true' : 'false'}${dir.modifiers && dir.modifiers.sync ? ',true' : ''})`;
    };
}

var baseDirectives = {
    on,
    bind,
    cloak: noop
};

class CodegenState {
    constructor(options) {
        this.options = options;
        this.warn = options.warn || baseWarn;
        this.transforms = pluckModuleFunction(options.modules, 'transformCode');
        this.dataGenFns = pluckModuleFunction(options.modules, 'genData');
        this.directives = extend(extend({}, baseDirectives), options.directives);
        const isReservedTag = options.isReservedTag || no;
        this.maybeComponent = (el) => !!el.component || !isReservedTag(el.tag);
        this.onceId = 0;
        this.staticRenderFns = [];
        this.pre = false;
    }
}
function generate$1(ast, options) {
    const state = new CodegenState(options);
    // fix #11483, Root level <script> tags should not be rendered.
    const code = ast
        ? ast.tag === 'script'
            ? 'null'
            : genElement(ast, state)
        : '_c("div")';
    return {
        render: `with(this){return ${code}}`,
        staticRenderFns: state.staticRenderFns
    };
}
function genElement(el, state) {
    if (el.parent) {
        el.pre = el.pre || el.parent.pre;
    }
    if (el.staticRoot && !el.staticProcessed) {
        return genStatic(el, state);
    }
    else if (el.once && !el.onceProcessed) {
        return genOnce(el, state);
    }
    else if (el.for && !el.forProcessed) {
        return genFor(el, state);
    }
    else if (el.if && !el.ifProcessed) {
        return genIf(el, state);
    }
    else if (el.tag === 'template' && !el.slotTarget && !state.pre) {
        return genChildren(el, state) || 'void 0';
    }
    else if (el.tag === 'slot') {
        return genSlot(el, state);
    }
    else {
        // component or element
        let code;
        if (el.component) {
            code = genComponent(el.component, el, state);
        }
        else {
            let data;
            const maybeComponent = state.maybeComponent(el);
            if (!el.plain || (el.pre && maybeComponent)) {
                data = genData(el, state);
            }
            let tag;
            // check if this is a component in <script setup>
            const bindings = state.options.bindings;
            if (maybeComponent && bindings && bindings.__isScriptSetup !== false) {
                tag = checkBindingType(bindings, el.tag);
            }
            if (!tag)
                tag = `'${el.tag}'`;
            const children = el.inlineTemplate ? null : genChildren(el, state, true);
            code = `_c(${tag}${data ? `,${data}` : '' // data
            }${children ? `,${children}` : '' // children
            })`;
        }
        // module transforms
        for (let i = 0; i < state.transforms.length; i++) {
            code = state.transforms[i](el, code);
        }
        return code;
    }
}
function checkBindingType(bindings, key) {
    const camelName = camelize(key);
    const PascalName = capitalize(camelName);
    const checkType = (type) => {
        if (bindings[key] === type) {
            return key;
        }
        if (bindings[camelName] === type) {
            return camelName;
        }
        if (bindings[PascalName] === type) {
            return PascalName;
        }
    };
    const fromConst = checkType("setup-const" /* BindingTypes.SETUP_CONST */) ||
        checkType("setup-reactive-const" /* BindingTypes.SETUP_REACTIVE_CONST */);
    if (fromConst) {
        return fromConst;
    }
    const fromMaybeRef = checkType("setup-let" /* BindingTypes.SETUP_LET */) ||
        checkType("setup-ref" /* BindingTypes.SETUP_REF */) ||
        checkType("setup-maybe-ref" /* BindingTypes.SETUP_MAYBE_REF */);
    if (fromMaybeRef) {
        return fromMaybeRef;
    }
}
// hoist static sub-trees out
function genStatic(el, state) {
    el.staticProcessed = true;
    // Some elements (templates) need to behave differently inside of a v-pre
    // node.  All pre nodes are static roots, so we can use this as a location to
    // wrap a state change and reset it upon exiting the pre node.
    const originalPreState = state.pre;
    if (el.pre) {
        state.pre = el.pre;
    }
    state.staticRenderFns.push(`with(this){return ${genElement(el, state)}}`);
    state.pre = originalPreState;
    return `_m(${state.staticRenderFns.length - 1}${el.staticInFor ? ',true' : ''})`;
}
// v-once
function genOnce(el, state) {
    el.onceProcessed = true;
    if (el.if && !el.ifProcessed) {
        return genIf(el, state);
    }
    else if (el.staticInFor) {
        let key = '';
        let parent = el.parent;
        while (parent) {
            if (parent.for) {
                key = parent.key;
                break;
            }
            parent = parent.parent;
        }
        if (!key) {
            process.env.NODE_ENV !== 'production' &&
                state.warn(`v-once can only be used inside v-for that is keyed. `, el.rawAttrsMap['v-once']);
            return genElement(el, state);
        }
        return `_o(${genElement(el, state)},${state.onceId++},${key})`;
    }
    else {
        return genStatic(el, state);
    }
}
function genIf(el, state, altGen, altEmpty) {
    el.ifProcessed = true; // avoid recursion
    return genIfConditions(el.ifConditions.slice(), state, altGen, altEmpty);
}
function genIfConditions(conditions, state, altGen, altEmpty) {
    if (!conditions.length) {
        return altEmpty || '_e()';
    }
    const condition = conditions.shift();
    if (condition.exp) {
        return `(${condition.exp})?${genTernaryExp(condition.block)}:${genIfConditions(conditions, state, altGen, altEmpty)}`;
    }
    else {
        return `${genTernaryExp(condition.block)}`;
    }
    // v-if with v-once should generate code like (a)?_m(0):_m(1)
    function genTernaryExp(el) {
        return altGen
            ? altGen(el, state)
            : el.once
                ? genOnce(el, state)
                : genElement(el, state);
    }
}
function genFor(el, state, altGen, altHelper) {
    const exp = el.for;
    const alias = el.alias;
    const iterator1 = el.iterator1 ? `,${el.iterator1}` : '';
    const iterator2 = el.iterator2 ? `,${el.iterator2}` : '';
    if (process.env.NODE_ENV !== 'production' &&
        state.maybeComponent(el) &&
        el.tag !== 'slot' &&
        el.tag !== 'template' &&
        !el.key) {
        state.warn(`<${el.tag} v-for="${alias} in ${exp}">: component lists rendered with ` +
            `v-for should have explicit keys. ` +
            `See https://v2.vuejs.org/v2/guide/list.html#key for more info.`, el.rawAttrsMap['v-for'], true /* tip */);
    }
    el.forProcessed = true; // avoid recursion
    return (`${altHelper || '_l'}((${exp}),` +
        `function(${alias}${iterator1}${iterator2}){` +
        `return ${(altGen || genElement)(el, state)}` +
        '})');
}
function genData(el, state) {
    let data = '{';
    // directives first.
    // directives may mutate the el's other properties before they are generated.
    const dirs = genDirectives(el, state);
    if (dirs)
        data += dirs + ',';
    // key
    if (el.key) {
        data += `key:${el.key},`;
    }
    // ref
    if (el.ref) {
        data += `ref:${el.ref},`;
    }
    if (el.refInFor) {
        data += `refInFor:true,`;
    }
    // pre
    if (el.pre) {
        data += `pre:true,`;
    }
    // record original tag name for components using "is" attribute
    if (el.component) {
        data += `tag:"${el.tag}",`;
    }
    // module data generation functions
    for (let i = 0; i < state.dataGenFns.length; i++) {
        data += state.dataGenFns[i](el);
    }
    // attributes
    if (el.attrs) {
        data += `attrs:${genProps(el.attrs)},`;
    }
    // DOM props
    if (el.props) {
        data += `domProps:${genProps(el.props)},`;
    }
    // event handlers
    if (el.events) {
        data += `${genHandlers(el.events, false)},`;
    }
    if (el.nativeEvents) {
        data += `${genHandlers(el.nativeEvents, true)},`;
    }
    // slot target
    // only for non-scoped slots
    if (el.slotTarget && !el.slotScope) {
        data += `slot:${el.slotTarget},`;
    }
    // scoped slots
    if (el.scopedSlots) {
        data += `${genScopedSlots(el, el.scopedSlots, state)},`;
    }
    // component v-model
    if (el.model) {
        data += `model:{value:${el.model.value},callback:${el.model.callback},expression:${el.model.expression}},`;
    }
    // inline-template
    if (el.inlineTemplate) {
        const inlineTemplate = genInlineTemplate(el, state);
        if (inlineTemplate) {
            data += `${inlineTemplate},`;
        }
    }
    data = data.replace(/,$/, '') + '}';
    // v-bind dynamic argument wrap
    // v-bind with dynamic arguments must be applied using the same v-bind object
    // merge helper so that class/style/mustUseProp attrs are handled correctly.
    if (el.dynamicAttrs) {
        data = `_b(${data},"${el.tag}",${genProps(el.dynamicAttrs)})`;
    }
    // v-bind data wrap
    if (el.wrapData) {
        data = el.wrapData(data);
    }
    // v-on data wrap
    if (el.wrapListeners) {
        data = el.wrapListeners(data);
    }
    return data;
}
function genDirectives(el, state) {
    const dirs = el.directives;
    if (!dirs)
        return;
    let res = 'directives:[';
    let hasRuntime = false;
    let i, l, dir, needRuntime;
    for (i = 0, l = dirs.length; i < l; i++) {
        dir = dirs[i];
        needRuntime = true;
        const gen = state.directives[dir.name];
        if (gen) {
            // compile-time directive that manipulates AST.
            // returns true if it also needs a runtime counterpart.
            needRuntime = !!gen(el, dir, state.warn);
        }
        if (needRuntime) {
            hasRuntime = true;
            res += `{name:"${dir.name}",rawName:"${dir.rawName}"${dir.value
                ? `,value:(${dir.value}),expression:${JSON.stringify(dir.value)}`
                : ''}${dir.arg ? `,arg:${dir.isDynamicArg ? dir.arg : `"${dir.arg}"`}` : ''}${dir.modifiers ? `,modifiers:${JSON.stringify(dir.modifiers)}` : ''}},`;
        }
    }
    if (hasRuntime) {
        return res.slice(0, -1) + ']';
    }
}
function genInlineTemplate(el, state) {
    const ast = el.children[0];
    if (process.env.NODE_ENV !== 'production' && (el.children.length !== 1 || ast.type !== 1)) {
        state.warn('Inline-template components must have exactly one child element.', { start: el.start });
    }
    if (ast && ast.type === 1) {
        const inlineRenderFns = generate$1(ast, state.options);
        return `inlineTemplate:{render:function(){${inlineRenderFns.render}},staticRenderFns:[${inlineRenderFns.staticRenderFns
            .map(code => `function(){${code}}`)
            .join(',')}]}`;
    }
}
function genScopedSlots(el, slots, state) {
    // by default scoped slots are considered "stable", this allows child
    // components with only scoped slots to skip forced updates from parent.
    // but in some cases we have to bail-out of this optimization
    // for example if the slot contains dynamic names, has v-if or v-for on them...
    let needsForceUpdate = el.for ||
        Object.keys(slots).some(key => {
            const slot = slots[key];
            return (slot.slotTargetDynamic || slot.if || slot.for || containsSlotChild(slot) // is passing down slot from parent which may be dynamic
            );
        });
    // #9534: if a component with scoped slots is inside a conditional branch,
    // it's possible for the same component to be reused but with different
    // compiled slot content. To avoid that, we generate a unique key based on
    // the generated code of all the slot contents.
    let needsKey = !!el.if;
    // OR when it is inside another scoped slot or v-for (the reactivity may be
    // disconnected due to the intermediate scope variable)
    // #9438, #9506
    // TODO: this can be further optimized by properly analyzing in-scope bindings
    // and skip force updating ones that do not actually use scope variables.
    if (!needsForceUpdate) {
        let parent = el.parent;
        while (parent) {
            if ((parent.slotScope && parent.slotScope !== emptySlotScopeToken) ||
                parent.for) {
                needsForceUpdate = true;
                break;
            }
            if (parent.if) {
                needsKey = true;
            }
            parent = parent.parent;
        }
    }
    const generatedSlots = Object.keys(slots)
        .map(key => genScopedSlot(slots[key], state))
        .join(',');
    return `scopedSlots:_u([${generatedSlots}]${needsForceUpdate ? `,null,true` : ``}${!needsForceUpdate && needsKey ? `,null,false,${hash(generatedSlots)}` : ``})`;
}
function hash(str) {
    let hash = 5381;
    let i = str.length;
    while (i) {
        hash = (hash * 33) ^ str.charCodeAt(--i);
    }
    return hash >>> 0;
}
function containsSlotChild(el) {
    if (el.type === 1) {
        if (el.tag === 'slot') {
            return true;
        }
        return el.children.some(containsSlotChild);
    }
    return false;
}
function genScopedSlot(el, state) {
    const isLegacySyntax = el.attrsMap['slot-scope'];
    if (el.if && !el.ifProcessed && !isLegacySyntax) {
        return genIf(el, state, genScopedSlot, `null`);
    }
    if (el.for && !el.forProcessed) {
        return genFor(el, state, genScopedSlot);
    }
    const slotScope = el.slotScope === emptySlotScopeToken ? `` : String(el.slotScope);
    const fn = `function(${slotScope}){` +
        `return ${el.tag === 'template'
            ? el.if && isLegacySyntax
                ? `(${el.if})?${genChildren(el, state) || 'undefined'}:undefined`
                : genChildren(el, state) || 'undefined'
            : genElement(el, state)}}`;
    // reverse proxy v-slot without scope on this.$slots
    const reverseProxy = slotScope ? `` : `,proxy:true`;
    return `{key:${el.slotTarget || `"default"`},fn:${fn}${reverseProxy}}`;
}
function genChildren(el, state, checkSkip, altGenElement, altGenNode) {
    const children = el.children;
    if (children.length) {
        const el = children[0];
        // optimize single v-for
        if (children.length === 1 &&
            el.for &&
            el.tag !== 'template' &&
            el.tag !== 'slot') {
            const normalizationType = checkSkip
                ? state.maybeComponent(el)
                    ? `,1`
                    : `,0`
                : ``;
            return `${(altGenElement || genElement)(el, state)}${normalizationType}`;
        }
        const normalizationType = checkSkip
            ? getNormalizationType(children, state.maybeComponent)
            : 0;
        const gen = altGenNode || genNode;
        return `[${children.map(c => gen(c, state)).join(',')}]${normalizationType ? `,${normalizationType}` : ''}`;
    }
}
// determine the normalization needed for the children array.
// 0: no normalization needed
// 1: simple normalization needed (possible 1-level deep nested array)
// 2: full normalization needed
function getNormalizationType(children, maybeComponent) {
    let res = 0;
    for (let i = 0; i < children.length; i++) {
        const el = children[i];
        if (el.type !== 1) {
            continue;
        }
        if (needsNormalization(el) ||
            (el.ifConditions &&
                el.ifConditions.some(c => needsNormalization(c.block)))) {
            res = 2;
            break;
        }
        if (maybeComponent(el) ||
            (el.ifConditions && el.ifConditions.some(c => maybeComponent(c.block)))) {
            res = 1;
        }
    }
    return res;
}
function needsNormalization(el) {
    return el.for !== undefined || el.tag === 'template' || el.tag === 'slot';
}
function genNode(node, state) {
    if (node.type === 1) {
        return genElement(node, state);
    }
    else if (node.type === 3 && node.isComment) {
        return genComment(node);
    }
    else {
        return genText(node);
    }
}
function genText(text) {
    return `_v(${text.type === 2
        ? text.expression // no need for () because already wrapped in _s()
        : transformSpecialNewlines(JSON.stringify(text.text))})`;
}
function genComment(comment) {
    return `_e(${JSON.stringify(comment.text)})`;
}
function genSlot(el, state) {
    const slotName = el.slotName || '"default"';
    const children = genChildren(el, state);
    let res = `_t(${slotName}${children ? `,function(){return ${children}}` : ''}`;
    const attrs = el.attrs || el.dynamicAttrs
        ? genProps((el.attrs || []).concat(el.dynamicAttrs || []).map(attr => ({
            // slot props are camelized
            name: camelize(attr.name),
            value: attr.value,
            dynamic: attr.dynamic
        })))
        : null;
    const bind = el.attrsMap['v-bind'];
    if ((attrs || bind) && !children) {
        res += `,null`;
    }
    if (attrs) {
        res += `,${attrs}`;
    }
    if (bind) {
        res += `${attrs ? '' : ',null'},${bind}`;
    }
    return res + ')';
}
// componentName is el.component, take it as argument to shun flow's pessimistic refinement
function genComponent(componentName, el, state) {
    const children = el.inlineTemplate ? null : genChildren(el, state, true);
    return `_c(${componentName},${genData(el, state)}${children ? `,${children}` : ''})`;
}
function genProps(props) {
    let staticProps = ``;
    let dynamicProps = ``;
    for (let i = 0; i < props.length; i++) {
        const prop = props[i];
        const value = transformSpecialNewlines(prop.value);
        if (prop.dynamic) {
            dynamicProps += `${prop.name},${value},`;
        }
        else {
            staticProps += `"${prop.name}":${value},`;
        }
    }
    staticProps = `{${staticProps.slice(0, -1)}}`;
    if (dynamicProps) {
        return `_d(${staticProps},[${dynamicProps.slice(0, -1)}])`;
    }
    else {
        return staticProps;
    }
}
// #3895, #4268
function transformSpecialNewlines(text) {
    return text.replace(/\u2028/g, '\\u2028').replace(/\u2029/g, '\\u2029');
}

// these keywords should not appear inside expressions, but operators like
// typeof, instanceof and in are allowed
const prohibitedKeywordRE = new RegExp('\\b' +
    ('do,if,for,let,new,try,var,case,else,with,await,break,catch,class,const,' +
        'super,throw,while,yield,delete,export,import,return,switch,default,' +
        'extends,finally,continue,debugger,function,arguments')
        .split(',')
        .join('\\b|\\b') +
    '\\b');
// these unary operators should not be used as property/method names
const unaryOperatorsRE = new RegExp('\\b' +
    'delete,typeof,void'.split(',').join('\\s*\\([^\\)]*\\)|\\b') +
    '\\s*\\([^\\)]*\\)');
// strip strings in expressions
const stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g;
// detect problematic expressions in a template
function detectErrors(ast, warn) {
    if (ast) {
        checkNode(ast, warn);
    }
}
function checkNode(node, warn) {
    if (node.type === 1) {
        for (const name in node.attrsMap) {
            if (dirRE.test(name)) {
                const value = node.attrsMap[name];
                if (value) {
                    const range = node.rawAttrsMap[name];
                    if (name === 'v-for') {
                        checkFor(node, `v-for="${value}"`, warn, range);
                    }
                    else if (name === 'v-slot' || name[0] === '#') {
                        checkFunctionParameterExpression(value, `${name}="${value}"`, warn, range);
                    }
                    else if (onRE.test(name)) {
                        checkEvent(value, `${name}="${value}"`, warn, range);
                    }
                    else {
                        checkExpression(value, `${name}="${value}"`, warn, range);
                    }
                }
            }
        }
        if (node.children) {
            for (let i = 0; i < node.children.length; i++) {
                checkNode(node.children[i], warn);
            }
        }
    }
    else if (node.type === 2) {
        checkExpression(node.expression, node.text, warn, node);
    }
}
function checkEvent(exp, text, warn, range) {
    const stripped = exp.replace(stripStringRE, '');
    const keywordMatch = stripped.match(unaryOperatorsRE);
    if (keywordMatch && stripped.charAt(keywordMatch.index - 1) !== '$') {
        warn(`avoid using JavaScript unary operator as property name: ` +
            `"${keywordMatch[0]}" in expression ${text.trim()}`, range);
    }
    checkExpression(exp, text, warn, range);
}
function checkFor(node, text, warn, range) {
    checkExpression(node.for || '', text, warn, range);
    checkIdentifier(node.alias, 'v-for alias', text, warn, range);
    checkIdentifier(node.iterator1, 'v-for iterator', text, warn, range);
    checkIdentifier(node.iterator2, 'v-for iterator', text, warn, range);
}
function checkIdentifier(ident, type, text, warn, range) {
    if (typeof ident === 'string') {
        try {
            new Function(`var ${ident}=_`);
        }
        catch (e) {
            warn(`invalid ${type} "${ident}" in expression: ${text.trim()}`, range);
        }
    }
}
function checkExpression(exp, text, warn, range) {
    try {
        new Function(`return ${exp}`);
    }
    catch (e) {
        const keywordMatch = exp
            .replace(stripStringRE, '')
            .match(prohibitedKeywordRE);
        if (keywordMatch) {
            warn(`avoid using JavaScript keyword as property name: ` +
                `"${keywordMatch[0]}"\n  Raw expression: ${text.trim()}`, range);
        }
        else {
            warn(`invalid expression: ${e.message} in\n\n` +
                `    ${exp}\n\n` +
                `  Raw expression: ${text.trim()}\n`, range);
        }
    }
}
function checkFunctionParameterExpression(exp, text, warn, range) {
    try {
        new Function(exp, '');
    }
    catch (e) {
        warn(`invalid function parameter expression: ${e.message} in\n\n` +
            `    ${exp}\n\n` +
            `  Raw expression: ${text.trim()}\n`, range);
    }
}

const range = 2;
function generateCodeFrame(source, start = 0, end = source.length) {
    const lines = source.split(/\r?\n/);
    let count = 0;
    const res = [];
    for (let i = 0; i < lines.length; i++) {
        count += lines[i].length + 1;
        if (count >= start) {
            for (let j = i - range; j <= i + range || end > count; j++) {
                if (j < 0 || j >= lines.length)
                    continue;
                res.push(`${j + 1}${repeat(` `, 3 - String(j + 1).length)}|  ${lines[j]}`);
                const lineLength = lines[j].length;
                if (j === i) {
                    // push underline
                    const pad = start - (count - lineLength) + 1;
                    const length = end > count ? lineLength - pad : end - start;
                    res.push(`   |  ` + repeat(` `, pad) + repeat(`^`, length));
                }
                else if (j > i) {
                    if (end > count) {
                        const length = Math.min(end - count, lineLength);
                        res.push(`   |  ` + repeat(`^`, length));
                    }
                    count += lineLength + 1;
                }
            }
            break;
        }
    }
    return res.join('\n');
}
function repeat(str, n) {
    let result = '';
    if (n > 0) {
        // eslint-disable-next-line no-constant-condition
        while (true) {
            // eslint-disable-line
            if (n & 1)
                result += str;
            n >>>= 1;
            if (n <= 0)
                break;
            str += str;
        }
    }
    return result;
}

function createFunction(code, errors) {
    try {
        return new Function(code);
    }
    catch (err) {
        errors.push({ err, code });
        return noop;
    }
}
function createCompileToFunctionFn(compile) {
    const cache = Object.create(null);
    return function compileToFunctions(template, options, vm) {
        options = extend({}, options);
        const warn = options.warn || warn$2;
        delete options.warn;
        /* istanbul ignore if */
        if (process.env.NODE_ENV !== 'production') {
            // detect possible CSP restriction
            try {
                new Function('return 1');
            }
            catch (e) {
                if (e.toString().match(/unsafe-eval|CSP/)) {
                    warn('It seems you are using the standalone build of Vue.js in an ' +
                        'environment with Content Security Policy that prohibits unsafe-eval. ' +
                        'The template compiler cannot work in this environment. Consider ' +
                        'relaxing the policy to allow unsafe-eval or pre-compiling your ' +
                        'templates into render functions.');
                }
            }
        }
        // check cache
        const key = options.delimiters
            ? String(options.delimiters) + template
            : template;
        if (cache[key]) {
            return cache[key];
        }
        // compile
        const compiled = compile(template, options);
        // check compilation errors/tips
        if (process.env.NODE_ENV !== 'production') {
            if (compiled.errors && compiled.errors.length) {
                if (options.outputSourceRange) {
                    compiled.errors.forEach(e => {
                        warn(`Error compiling template:\n\n${e.msg}\n\n` +
                            generateCodeFrame(template, e.start, e.end), vm);
                    });
                }
                else {
                    warn(`Error compiling template:\n\n${template}\n\n` +
                        compiled.errors.map(e => `- ${e}`).join('\n') +
                        '\n', vm);
                }
            }
            if (compiled.tips && compiled.tips.length) {
                if (options.outputSourceRange) {
                    compiled.tips.forEach(e => tip(e.msg, vm));
                }
                else {
                    compiled.tips.forEach(msg => tip(msg, vm));
                }
            }
        }
        // turn code into functions
        const res = {};
        const fnGenErrors = [];
        res.render = createFunction(compiled.render, fnGenErrors);
        res.staticRenderFns = compiled.staticRenderFns.map(code => {
            return createFunction(code, fnGenErrors);
        });
        // check function generation errors.
        // this should only happen if there is a bug in the compiler itself.
        // mostly for codegen development use
        /* istanbul ignore if */
        if (process.env.NODE_ENV !== 'production') {
            if ((!compiled.errors || !compiled.errors.length) && fnGenErrors.length) {
                warn(`Failed to generate render function:\n\n` +
                    fnGenErrors
                        .map(({ err, code }) => `${err.toString()} in\n\n${code}\n`)
                        .join('\n'), vm);
            }
        }
        return (cache[key] = res);
    };
}

function createCompilerCreator(baseCompile) {
    return function createCompiler(baseOptions) {
        function compile(template, options) {
            const finalOptions = Object.create(baseOptions);
            const errors = [];
            const tips = [];
            let warn = (msg, range, tip) => {
                (tip ? tips : errors).push(msg);
            };
            if (options) {
                if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
                    // $flow-disable-line
                    const leadingSpaceLength = template.match(/^\s*/)[0].length;
                    warn = (msg, range, tip) => {
                        const data = typeof msg === 'string' ? { msg } : msg;
                        if (range) {
                            if (range.start != null) {
                                data.start = range.start + leadingSpaceLength;
                            }
                            if (range.end != null) {
                                data.end = range.end + leadingSpaceLength;
                            }
                        }
                        (tip ? tips : errors).push(data);
                    };
                }
                // merge custom modules
                if (options.modules) {
                    finalOptions.modules = (baseOptions.modules || []).concat(options.modules);
                }
                // merge custom directives
                if (options.directives) {
                    finalOptions.directives = extend(Object.create(baseOptions.directives || null), options.directives);
                }
                // copy other options
                for (const key in options) {
                    if (key !== 'modules' && key !== 'directives') {
                        finalOptions[key] = options[key];
                    }
                }
            }
            finalOptions.warn = warn;
            const compiled = baseCompile(template.trim(), finalOptions);
            if (process.env.NODE_ENV !== 'production') {
                detectErrors(compiled.ast, warn);
            }
            compiled.errors = errors;
            compiled.tips = tips;
            return compiled;
        }
        return {
            compile,
            compileToFunctions: createCompileToFunctionFn(compile)
        };
    };
}

// `createCompilerCreator` allows creating compilers that use alternative
// parser/optimizer/codegen, e.g the SSR optimizing compiler.
// Here we just export a default compiler using the default parts.
const createCompiler$1 = createCompilerCreator(function baseCompile(template, options) {
    const ast = parse(template.trim(), options);
    if (options.optimize !== false) {
        optimize$1(ast, options);
    }
    const code = generate$1(ast, options);
    return {
        ast,
        render: code.render,
        staticRenderFns: code.staticRenderFns
    };
});

const { compile: compile$1, compileToFunctions: compileToFunctions$1 } = createCompiler$1(baseOptions);

const isAttr = makeMap('accept,accept-charset,accesskey,action,align,alt,async,autocomplete,' +
    'autofocus,autoplay,autosave,bgcolor,border,buffered,challenge,charset,' +
    'checked,cite,class,code,codebase,color,cols,colspan,content,' +
    'contenteditable,contextmenu,controls,coords,data,datetime,default,' +
    'defer,dir,dirname,disabled,download,draggable,dropzone,enctype,for,' +
    'form,formaction,headers,height,hidden,high,href,hreflang,http-equiv,' +
    'icon,id,ismap,itemprop,keytype,kind,label,lang,language,list,loop,low,' +
    'manifest,max,maxlength,media,method,GET,POST,min,multiple,email,file,' +
    'muted,name,novalidate,open,optimum,pattern,ping,placeholder,poster,' +
    'preload,radiogroup,readonly,rel,required,reversed,rows,rowspan,sandbox,' +
    'scope,scoped,seamless,selected,shape,size,type,text,password,sizes,span,' +
    'spellcheck,src,srcdoc,srclang,srcset,start,step,style,summary,tabindex,' +
    'target,title,usemap,value,width,wrap');
/* istanbul ignore next */
const isRenderableAttr = (name) => {
    return (isAttr(name) || name.indexOf('data-') === 0 || name.indexOf('aria-') === 0);
};
const propsToAttrMap = {
    acceptCharset: 'accept-charset',
    className: 'class',
    htmlFor: 'for',
    httpEquiv: 'http-equiv'
};
const ESC = {
    '<': '&lt;',
    '>': '&gt;',
    '"': '&quot;',
    '&': '&amp;'
};
function escape(s) {
    return s.replace(/[<>"&]/g, escapeChar);
}
function escapeChar(a) {
    return ESC[a] || a;
}

const plainStringRE = /^"(?:[^"\\]|\\.)*"$|^'(?:[^'\\]|\\.)*'$/;
// let the model AST transform translate v-model into appropriate
// props bindings
function applyModelTransform(el, state) {
    if (el.directives) {
        for (let i = 0; i < el.directives.length; i++) {
            const dir = el.directives[i];
            if (dir.name === 'model') {
                state.directives.model(el, dir, state.warn);
                // remove value for textarea as its converted to text
                if (el.tag === 'textarea' && el.props) {
                    el.props = el.props.filter(p => p.name !== 'value');
                }
                break;
            }
        }
    }
}
function genAttrSegments(attrs) {
    return attrs.map(({ name, value }) => genAttrSegment(name, value));
}
function genDOMPropSegments(props, attrs) {
    const segments = [];
    props.forEach(({ name, value }) => {
        name = propsToAttrMap[name] || name.toLowerCase();
        if (isRenderableAttr(name) &&
            !(attrs && attrs.some(a => a.name === name))) {
            segments.push(genAttrSegment(name, value));
        }
    });
    return segments;
}
function genAttrSegment(name, value) {
    if (plainStringRE.test(value)) {
        // force double quote
        value = value.replace(/^'|'$/g, '"');
        // force enumerated attr to "true"
        if (isEnumeratedAttr(name) && value !== `"false"`) {
            value = `"true"`;
        }
        return {
            type: RAW,
            value: isBooleanAttr(name)
                ? ` ${name}="${name}"`
                : value === '""'
                    ? ` ${name}`
                    : ` ${name}="${JSON.parse(value)}"`
        };
    }
    else {
        return {
            type: EXPRESSION,
            value: `_ssrAttr(${JSON.stringify(name)},${value})`
        };
    }
}
function genClassSegments(staticClass, classBinding) {
    if (staticClass && !classBinding) {
        return [{ type: RAW, value: ` class="${JSON.parse(staticClass)}"` }];
    }
    else {
        return [
            {
                type: EXPRESSION,
                value: `_ssrClass(${staticClass || 'null'},${classBinding || 'null'})`
            }
        ];
    }
}
function genStyleSegments(staticStyle, parsedStaticStyle, styleBinding, vShowExpression) {
    if (staticStyle && !styleBinding && !vShowExpression) {
        return [{ type: RAW, value: ` style=${JSON.stringify(staticStyle)}` }];
    }
    else {
        return [
            {
                type: EXPRESSION,
                value: `_ssrStyle(${parsedStaticStyle || 'null'},${styleBinding || 'null'}, ${vShowExpression
                    ? `{ display: (${vShowExpression}) ? '' : 'none' }`
                    : 'null'})`
            }
        ];
    }
}

/**
 * In SSR, the vdom tree is generated only once and never patched, so
 * we can optimize most element / trees into plain string render functions.
 * The SSR optimizer walks the AST tree to detect optimizable elements and trees.
 *
 * The criteria for SSR optimizability is quite a bit looser than static tree
 * detection (which is designed for client re-render). In SSR we bail only for
 * components/slots/custom directives.
 */
// optimizability constants
const optimizability = {
    FALSE: 0,
    FULL: 1,
    SELF: 2,
    CHILDREN: 3,
    PARTIAL: 4 // self un-optimizable with some un-optimizable children
};
let isPlatformReservedTag;
function optimize(root, options) {
    if (!root)
        return;
    isPlatformReservedTag = options.isReservedTag || no;
    walk(root, true);
}
function walk(node, isRoot) {
    if (isUnOptimizableTree(node)) {
        node.ssrOptimizability = optimizability.FALSE;
        return;
    }
    // root node or nodes with custom directives should always be a VNode
    const selfUnoptimizable = isRoot || hasCustomDirective(node);
    const check = child => {
        if (child.ssrOptimizability !== optimizability.FULL) {
            node.ssrOptimizability = selfUnoptimizable
                ? optimizability.PARTIAL
                : optimizability.SELF;
        }
    };
    if (selfUnoptimizable) {
        node.ssrOptimizability = optimizability.CHILDREN;
    }
    if (node.type === 1) {
        for (let i = 0, l = node.children.length; i < l; i++) {
            const child = node.children[i];
            walk(child);
            check(child);
        }
        if (node.ifConditions) {
            for (let i = 1, l = node.ifConditions.length; i < l; i++) {
                const block = node.ifConditions[i].block;
                walk(block, isRoot);
                check(block);
            }
        }
        if (node.ssrOptimizability == null ||
            (!isRoot && (node.attrsMap['v-html'] || node.attrsMap['v-text']))) {
            node.ssrOptimizability = optimizability.FULL;
        }
        else {
            node.children = optimizeSiblings(node);
        }
    }
    else {
        node.ssrOptimizability = optimizability.FULL;
    }
}
function optimizeSiblings(el) {
    const children = el.children;
    const optimizedChildren = [];
    let currentOptimizableGroup = [];
    const pushGroup = () => {
        if (currentOptimizableGroup.length) {
            optimizedChildren.push({
                type: 1,
                parent: el,
                tag: 'template',
                attrsList: [],
                attrsMap: {},
                rawAttrsMap: {},
                children: currentOptimizableGroup,
                ssrOptimizability: optimizability.FULL
            });
        }
        currentOptimizableGroup = [];
    };
    for (let i = 0; i < children.length; i++) {
        const c = children[i];
        if (c.ssrOptimizability === optimizability.FULL) {
            currentOptimizableGroup.push(c);
        }
        else {
            // wrap fully-optimizable adjacent siblings inside a template tag
            // so that they can be optimized into a single ssrNode by codegen
            pushGroup();
            optimizedChildren.push(c);
        }
    }
    pushGroup();
    return optimizedChildren;
}
function isUnOptimizableTree(node) {
    if (node.type === 2 || node.type === 3) {
        // text or expression
        return false;
    }
    return (isBuiltInTag(node.tag) || // built-in (slot, component)
        !isPlatformReservedTag(node.tag) || // custom component
        !!node.component || // "is" component
        isSelectWithModel(node) // <select v-model> requires runtime inspection
    );
}
const isBuiltInDir = makeMap('text,html,show,on,bind,model,pre,cloak,once');
function hasCustomDirective(node) {
    return (node.type === 1 &&
        node.directives &&
        node.directives.some(d => !isBuiltInDir(d.name)));
}
// <select v-model> cannot be optimized because it requires a runtime check
// to determine proper selected option
function isSelectWithModel(node) {
    return (node.type === 1 &&
        node.tag === 'select' &&
        node.directives != null &&
        node.directives.some(d => d.name === 'model'));
}

// The SSR codegen is essentially extending the default codegen to handle
// segment types
const RAW = 0;
const INTERPOLATION = 1;
const EXPRESSION = 2;
function generate(ast, options) {
    const state = new CodegenState(options);
    const code = ast ? genSSRElement(ast, state) : '_c("div")';
    return {
        render: `with(this){return ${code}}`,
        staticRenderFns: state.staticRenderFns
    };
}
function genSSRElement(el, state) {
    if (el.for && !el.forProcessed) {
        return genFor(el, state, genSSRElement);
    }
    else if (el.if && !el.ifProcessed) {
        return genIf(el, state, genSSRElement);
    }
    else if (el.tag === 'template' && !el.slotTarget) {
        return el.ssrOptimizability === optimizability.FULL
            ? genChildrenAsStringNode(el, state)
            : genSSRChildren(el, state) || 'void 0';
    }
    switch (el.ssrOptimizability) {
        case optimizability.FULL:
            // stringify whole tree
            return genStringElement(el, state);
        case optimizability.SELF:
            // stringify self and check children
            return genStringElementWithChildren(el, state);
        case optimizability.CHILDREN:
            // generate self as VNode and stringify children
            return genNormalElement(el, state, true);
        case optimizability.PARTIAL:
            // generate self as VNode and check children
            return genNormalElement(el, state, false);
        default:
            // bail whole tree
            return genElement(el, state);
    }
}
function genNormalElement(el, state, stringifyChildren) {
    const data = el.plain ? undefined : genData(el, state);
    const children = stringifyChildren
        ? `[${genChildrenAsStringNode(el, state)}]`
        : genSSRChildren(el, state, true);
    return `_c('${el.tag}'${data ? `,${data}` : ''}${children ? `,${children}` : ''})`;
}
function genSSRChildren(el, state, checkSkip) {
    return genChildren(el, state, checkSkip, genSSRElement, genSSRNode);
}
function genSSRNode(el, state) {
    return el.type === 1 ? genSSRElement(el, state) : genText(el);
}
function genChildrenAsStringNode(el, state) {
    return el.children.length
        ? `_ssrNode(${flattenSegments(childrenToSegments(el, state))})`
        : '';
}
function genStringElement(el, state) {
    return `_ssrNode(${elementToString(el, state)})`;
}
function genStringElementWithChildren(el, state) {
    const children = genSSRChildren(el, state, true);
    return `_ssrNode(${flattenSegments(elementToOpenTagSegments(el, state))},"</${el.tag}>"${children ? `,${children}` : ''})`;
}
function elementToString(el, state) {
    return `(${flattenSegments(elementToSegments(el, state))})`;
}
function elementToSegments(el, state) {
    // v-for / v-if
    if (el.for && !el.forProcessed) {
        el.forProcessed = true;
        return [
            {
                type: EXPRESSION,
                value: genFor(el, state, elementToString, '_ssrList')
            }
        ];
    }
    else if (el.if && !el.ifProcessed) {
        el.ifProcessed = true;
        return [
            {
                type: EXPRESSION,
                value: genIf(el, state, elementToString, '"<!---->"')
            }
        ];
    }
    else if (el.tag === 'template') {
        return childrenToSegments(el, state);
    }
    const openSegments = elementToOpenTagSegments(el, state);
    const childrenSegments = childrenToSegments(el, state);
    const { isUnaryTag } = state.options;
    const close = isUnaryTag && isUnaryTag(el.tag)
        ? []
        : [{ type: RAW, value: `</${el.tag}>` }];
    return openSegments.concat(childrenSegments, close);
}
function elementToOpenTagSegments(el, state) {
    applyModelTransform(el, state);
    let binding;
    const segments = [{ type: RAW, value: `<${el.tag}` }];
    // attrs
    if (el.attrs) {
        segments.push.apply(segments, genAttrSegments(el.attrs));
    }
    // domProps
    if (el.props) {
        segments.push.apply(segments, genDOMPropSegments(el.props, el.attrs));
    }
    // v-bind="object"
    if ((binding = el.attrsMap['v-bind'])) {
        segments.push({ type: EXPRESSION, value: `_ssrAttrs(${binding})` });
    }
    // v-bind.prop="object"
    if ((binding = el.attrsMap['v-bind.prop'])) {
        segments.push({ type: EXPRESSION, value: `_ssrDOMProps(${binding})` });
    }
    // class
    if (el.staticClass || el.classBinding) {
        segments.push.apply(segments, genClassSegments(el.staticClass, el.classBinding));
    }
    // style & v-show
    if (el.staticStyle || el.styleBinding || el.attrsMap['v-show']) {
        segments.push.apply(segments, genStyleSegments(el.attrsMap.style, el.staticStyle, el.styleBinding, el.attrsMap['v-show']));
    }
    // _scopedId
    if (state.options.scopeId) {
        segments.push({ type: RAW, value: ` ${state.options.scopeId}` });
    }
    segments.push({ type: RAW, value: `>` });
    return segments;
}
function childrenToSegments(el, state) {
    let binding;
    if ((binding = el.attrsMap['v-html'])) {
        return [{ type: EXPRESSION, value: `_s(${binding})` }];
    }
    if ((binding = el.attrsMap['v-text'])) {
        return [{ type: INTERPOLATION, value: `_s(${binding})` }];
    }
    if (el.tag === 'textarea' && (binding = el.attrsMap['v-model'])) {
        return [{ type: INTERPOLATION, value: `_s(${binding})` }];
    }
    return el.children ? nodesToSegments(el.children, state) : [];
}
function nodesToSegments(children, state) {
    const segments = [];
    for (let i = 0; i < children.length; i++) {
        const c = children[i];
        if (c.type === 1) {
            segments.push.apply(segments, elementToSegments(c, state));
        }
        else if (c.type === 2) {
            segments.push({ type: INTERPOLATION, value: c.expression });
        }
        else if (c.type === 3) {
            let text = escape(c.text);
            if (c.isComment) {
                text = '<!--' + text + '-->';
            }
            segments.push({ type: RAW, value: text });
        }
    }
    return segments;
}
function flattenSegments(segments) {
    const mergedSegments = [];
    let textBuffer = '';
    const pushBuffer = () => {
        if (textBuffer) {
            mergedSegments.push(JSON.stringify(textBuffer));
            textBuffer = '';
        }
    };
    for (let i = 0; i < segments.length; i++) {
        const s = segments[i];
        if (s.type === RAW) {
            textBuffer += s.value;
        }
        else if (s.type === INTERPOLATION) {
            pushBuffer();
            mergedSegments.push(`_ssrEscape(${s.value})`);
        }
        else if (s.type === EXPRESSION) {
            pushBuffer();
            mergedSegments.push(`(${s.value})`);
        }
    }
    pushBuffer();
    return mergedSegments.join('+');
}

const createCompiler = createCompilerCreator(function baseCompile(template, options) {
    const ast = parse(template.trim(), options);
    optimize(ast, options);
    const code = generate(ast, options);
    return {
        ast,
        render: code.render,
        staticRenderFns: code.staticRenderFns
    };
});

const { compile, compileToFunctions } = createCompiler(baseOptions);

exports.compile = compile$1;
exports.compileToFunctions = compileToFunctions$1;
exports.generateCodeFrame = generateCodeFrame;
exports.parseComponent = parseComponent;
exports.ssrCompile = compile;
exports.ssrCompileToFunctions = compileToFunctions;