ref: deepClone & deepMerge

BeiQiaoT · BeiQiaoT · commit 21759d31add1 · 2023-03-27T18:06:09.000+08:00
diff --git a/uview-ui/libs/function/deepClone.js b/uview-ui/libs/function/deepClone.js
@@ -1,23 +1,35 @@
 // 判断arr是否为一个数组，返回一个bool值
-function isArray (arr) {
-    return Object.prototype.toString.call(arr) === '[object Array]';
+function isArray(arr) {
+	return Object.prototype.toString.call(arr) === '[object Array]';
 }
 
 // 深度克隆
-function deepClone (obj) {
-	// 对常见的“非”值，直接返回原来值
-	if([null, undefined, NaN, false].includes(obj)) return obj;
-    if(typeof obj !== "object" && typeof obj !== 'function') {
-		//原始类型直接返回
-        return obj;
-    }
-    var o = isArray(obj) ? [] : {};
-    for(let i in obj) {
-        if(obj.hasOwnProperty(i)){
-            o[i] = typeof obj[i] === "object" ? deepClone(obj[i]) : obj[i];
-        }
-    }
-    return o;
+function deepClone(obj, cache = new WeakMap()) {
+	if (obj === null || typeof obj !== 'object') return obj;
+	if (cache.has(obj)) return cache.get(obj);
+	let clone;
+	if (obj instanceof Date) {
+		clone = new Date(obj.getTime());
+	} else if (obj instanceof RegExp) {
+		clone = new RegExp(obj);
+	} else if (obj instanceof Map) {
+		clone = new Map(Array.from(obj, ([key, value]) => [key, deepClone(value, cache)]));
+	} else if (obj instanceof Set) {
+		clone = new Set(Array.from(obj, value => deepClone(value, cache)));
+	} else if (Array.isArray(obj)) {
+		clone = obj.map(value => deepClone(value, cache));
+	} else if (Object.prototype.toString.call(obj) === '[object Object]') {
+		clone = Object.create(Object.getPrototypeOf(obj));
+		cache.set(obj, clone);
+		for (const [key, value] of Object.entries(obj)) {
+			clone[key] = deepClone(value, cache);
+		}
+	} else {
+		clone = Object.assign({}, obj);
+	}
+	cache.set(obj, clone);
+	return clone;
 }
 
+
 export default deepClone;
diff --git a/uview-ui/libs/function/deepMerge.js b/uview-ui/libs/function/deepMerge.js
@@ -3,28 +3,27 @@ import deepClone from "./deepClone";
 // JS对象深度合并
 function deepMerge(target = {}, source = {}) {
 	target = deepClone(target);
-	if (typeof target !== 'object' || typeof source !== 'object') return false;
-	for (var prop in source) {
+	if (typeof target !== 'object' || target === null || typeof source !== 'object' || source === null) return target;
+	const merged = Array.isArray(target) ? target.slice() : Object.assign({}, target);
+	for (const prop in source) {
 		if (!source.hasOwnProperty(prop)) continue;
-		if (prop in target) {
-			if (typeof target[prop] !== 'object') {
-				target[prop] = source[prop];
-			} else {
-				if (typeof source[prop] !== 'object') {
-					target[prop] = source[prop];
-				} else {
-					if (target[prop].concat && source[prop].concat) {
-						target[prop] = target[prop].concat(source[prop]);
-					} else {
-						target[prop] = deepMerge(target[prop], source[prop]);
-					}
-				}
-			}
+		const sourceValue = source[prop];
+		const targetValue = merged[prop];
+		if (sourceValue instanceof Date) {
+			merged[prop] = new Date(sourceValue);
+		} else if (sourceValue instanceof RegExp) {
+			merged[prop] = new RegExp(sourceValue);
+		} else if (sourceValue instanceof Map) {
+			merged[prop] = new Map(sourceValue);
+		} else if (sourceValue instanceof Set) {
+			merged[prop] = new Set(sourceValue);
+		} else if (typeof sourceValue === 'object' && sourceValue !== null) {
+			merged[prop] = deepMerge(targetValue, sourceValue);
 		} else {
-			target[prop] = source[prop];
+			merged[prop] = sourceValue;
 		}
 	}
-	return target;
+	return merged;
 }
 
-export default deepMerge;
+export default deepMerge;
