You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
36 lines
1.1 KiB
36 lines
1.1 KiB
1 year ago
|
// 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]';
|
||
|
|
}
|
||
|
|
|
||
|
|
// 深度克隆
|
||
|
|
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;
|