50 lines
1.6 KiB
JavaScript
50 lines
1.6 KiB
JavaScript
'use strict';
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Object.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });
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const isPrimitive = require('../predicate/isPrimitive.js');
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const isTypedArray = require('../predicate/isTypedArray.js');
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function clone(obj) {
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if (isPrimitive.isPrimitive(obj)) {
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return obj;
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}
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if (Array.isArray(obj) ||
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isTypedArray.isTypedArray(obj) ||
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obj instanceof ArrayBuffer ||
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(typeof SharedArrayBuffer !== 'undefined' && obj instanceof SharedArrayBuffer)) {
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return obj.slice(0);
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}
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const prototype = Object.getPrototypeOf(obj);
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const Constructor = prototype.constructor;
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if (obj instanceof Date || obj instanceof Map || obj instanceof Set) {
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return new Constructor(obj);
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}
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if (obj instanceof RegExp) {
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const newRegExp = new Constructor(obj);
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newRegExp.lastIndex = obj.lastIndex;
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return newRegExp;
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}
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if (obj instanceof DataView) {
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return new Constructor(obj.buffer.slice(0));
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}
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if (obj instanceof Error) {
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const newError = new Constructor(obj.message);
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newError.stack = obj.stack;
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newError.name = obj.name;
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newError.cause = obj.cause;
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return newError;
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}
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if (typeof File !== 'undefined' && obj instanceof File) {
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const newFile = new Constructor([obj], obj.name, { type: obj.type, lastModified: obj.lastModified });
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return newFile;
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}
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if (typeof obj === 'object') {
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const newObject = Object.create(prototype);
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return Object.assign(newObject, obj);
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}
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return obj;
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}
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exports.clone = clone;
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