| 1 | 'use strict'
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| 2 |
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| 3 | module.exports = clone
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| 4 |
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| 5 | var getPrototypeOf = Object.getPrototypeOf || function (obj) {
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| 6 | return obj.__proto__
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| 7 | }
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| 8 |
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| 9 | function clone (obj) {
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| 10 | if (obj === null || typeof obj !== 'object')
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| 11 | return obj
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| 12 |
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| 13 | if (obj instanceof Object)
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| 14 | var copy = { __proto__: getPrototypeOf(obj) }
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| 15 | else
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| 16 | var copy = Object.create(null)
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| 17 |
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| 18 | Object.getOwnPropertyNames(obj).forEach(function (key) {
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| 19 | Object.defineProperty(copy, key, Object.getOwnPropertyDescriptor(obj, key))
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| 20 | })
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| 21 |
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| 22 | return copy
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| 23 | }
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