press-ui
Version:
简单、易用的跨端组件库，兼容 Vue2 和 Vue3，同时支持 uni-app和普通 Vue 项目
33 lines (32 loc) • 1.16 kB
JavaScript
/**
* @description 深度克隆
* @param {object} obj 需要深度克隆的对象
* @param cache 缓存
* @returns {*} 克隆后的对象或者原值（不是对象）
*/
export 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;
}