Created
April 8, 2022 19:16
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JavaScript to deep clone anything (client-side)
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| 'use strict' | |
| function deepClone (data, hash = new WeakMap()) { | |
| if (Object(data) !== data) return data | |
| if (hash.has(data)) return hash.get(data) | |
| const result = data instanceof Date | |
| ? new Date(data) | |
| : (data instanceof RegExp | |
| ? new RegExp(data.source, data.flags) | |
| : (data instanceof Set | |
| ? new Set() | |
| : (data instanceof Map | |
| ? new Map() | |
| : (typeof data.constructor !== 'function' | |
| ? Object.create(null) | |
| : (data.prototype !== void 0 && typeof data.prototype.constructor === 'function' | |
| ? data | |
| : new data.constructor() | |
| ) | |
| ) | |
| ) | |
| ) | |
| ) | |
| if (typeof data.constructor === 'function' && typeof data.valueOf === 'function') { | |
| const val = data.valueOf() | |
| if (Object(val) !== val) { | |
| const result = new data.constructor(val) | |
| hash.set(data, result) | |
| return result | |
| } | |
| } | |
| hash.set(data, result) | |
| if (data instanceof Set) { | |
| data.forEach(val => { | |
| result.add(deepClone(val, hash)) | |
| }) | |
| } | |
| else if (data instanceof Map) { | |
| data.forEach((val, key) => { | |
| result.set(key, deepClone(val, hash)) | |
| }) | |
| } | |
| return Object.assign( | |
| result, | |
| ...Object.keys(data).map(key => ({ [ key ]: deepClone(data[ key ], hash) })) | |
| ) | |
| } | |
| export default deepClone |
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