Better applyDeltas

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "@ztimson/utils",
-	"version": "0.27.1",
+	"version": "0.27.3",
 	"description": "Utility library",
 	"author": "Zak Timson",
 	"license": "MIT",

src/objects.ts

@@ -1,22 +1,28 @@
 export type Delta = { [key: string]: any | Delta | null };
 
+
 /**
- * Applies deltas in order to modify `target`.
- * @param base - Original
- * @param deltas - List of deltas to apply
+ * Applies deltas to `target`.
+ * @param base starting point
+ * @param deltas List of deltas to apply
  * @returns Mutated target
  */
-export function applyDelta(base: any, deltas: any): any {
-	if(deltas === null) return null;
-	if(typeof base !== 'object' || base === null) return deltas === undefined ? base : deltas;
-	const result = Array.isArray(base) ? [...base] : { ...base };
-	for(const key in deltas) {
-		const val = deltas[key];
-		if (val === undefined) delete result[key];
-		else if (typeof val === 'object' && val !== null && !(Array.isArray(val))) result[key] = applyDelta(result[key], val);
-		else result[key] = val;
+export function applyDeltas(base: any, ...deltas: any[]): any {
+	function applyDelta(base: any, delta: any): any {
+		if(delta === null) return null;
+		if(typeof base !== 'object' || base === null) return delta === undefined ? base : delta;
+		const result = Array.isArray(base) ? [...base] : { ...base };
+		for(const key in delta) {
+			const val = delta[key];
+			if(val === undefined) delete result[key];
+			else if(typeof val === 'object' && val !== null && !Array.isArray(val)) result[key] = applyDelta(result[key], val);
+			else result[key] = val;
+		}
+		return result;
 	}
-	return result;
+
+	for(const d of deltas.flat()) base = applyDelta(base, d?.delta ?? d);
+	return base;
 }
 
 /**
@@ -34,7 +40,7 @@ export function calcDelta(old: any, updated: any): any {
 		const newVal = updated?.[key];
 		if(isObj(oldVal) && isObj(newVal)) {
 			const nested = calcDelta(oldVal, newVal);
-			if (nested !== null && Object.keys(nested).length > 0) delta[key] = nested;
+			if(nested !== null && Object.keys(nested).length > 0) delta[key] = nested;
 		} else if(JSON.stringify(oldVal) !== JSON.stringify(newVal)) {
 			delta[key] = newVal;
 		}
@@ -319,8 +325,8 @@ export function JSONSerialize<T1>(obj: T1): T1 | string {
 export function JSONSanitize(obj: any, space?: number): string {
 	const cache: any[] = [];
 	return JSON.stringify(obj, (key, value) => {
-		if (typeof value === 'object' && value !== null) {
-			if (cache.includes(value)) return '[Circular]';
+		if(typeof value === 'object' && value !== null) {
+			if(cache.includes(value)) return '[Circular]';
 			cache.push(value);
 		}
 		return value;