36 lines
943 B
TypeScript
36 lines
943 B
TypeScript
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export const cloneDeep = <T>(value: T, visited = new WeakMap()): T => {
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if (value === null || typeof value !== 'object') {
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return value
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}
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if (visited.has(value)) {
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return visited.get(value)
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}
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if (Array.isArray(value)) {
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const clonedArray = value.map((item) => cloneDeep(item, visited)) as any
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visited.set(value, clonedArray)
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return clonedArray
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}
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if (value instanceof Date) {
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return new Date(value.getTime()) as any
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}
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if (value instanceof RegExp) {
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const flags = value.flags
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return new RegExp(value.source, flags) as any
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}
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const clonedObject = {} as T
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visited.set(value, clonedObject)
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for (const key in value) {
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if (Object.prototype.hasOwnProperty.call(value, key)) {
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clonedObject[key] = cloneDeep(value[key], visited)
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}
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}
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const prototype = Object.getPrototypeOf(value)
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Object.setPrototypeOf(clonedObject, cloneDeep(prototype, visited))
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return clonedObject
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}
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