export default {
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deepCopy(target) {
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const map = new WeakMap()
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function isObject(target) {
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return (typeof target === 'object' && target ) || typeof target === 'function'
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}
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function clone(data) {
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if (!isObject(data)) {
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return data
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}
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if ([Date, RegExp].includes(data.constructor)) {
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return new data.constructor(data)
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}
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if (typeof data === 'function') {
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return new Function('return ' + data.toString())()
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}
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const exist = map.get(data)
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if (exist) {
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return exist
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}
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if (data instanceof Map) {
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const result = new Map()
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map.set(data, result)
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data.forEach((val, key) => {
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if (isObject(val)) {
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result.set(key, clone(val))
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} else {
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result.set(key, val)
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}
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})
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return result
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}
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if (data instanceof Set) {
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const result = new Set()
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map.set(data, result)
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data.forEach(val => {
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if (isObject(val)) {
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result.add(clone(val))
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} else {
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result.add(val)
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}
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})
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return result
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}
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const keys = Reflect.ownKeys(data)
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const allDesc = Object.getOwnPropertyDescriptors(data)
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const result = Object.create(Object.getPrototypeOf(data), allDesc)
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map.set(data, result)
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keys.forEach(key => {
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const val = data[key]
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if (isObject(val)) {
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result[key] = clone(val)
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} else {
|
result[key] = val
|
}
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})
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return result
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}
|
// clone(target)
|
return JSON.parse(JSON.stringify(target));
|
}
|
|
}
|
