https://github.com/aweiu/clone

js对象深拷贝demo
https://github.com/aweiu/clone

Last synced: 3 months ago
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js对象深拷贝demo

• Host: GitHub
• URL: https://github.com/aweiu/clone
• Owner: aweiu
• Created: 2018-10-14T11:36:29.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2018-10-14T12:22:53.000Z (over 6 years ago)
• Last Synced: 2025-01-06T10:13:29.302Z (5 months ago)
• Size: 1.95 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# clone

js对象深拷贝demo，测试用

```

function isObject (data) {

  return Object.prototype.toString.call(data) === '[object Object]'

}

function clone (obj) {

  const root = {}

  const tmp = [

    {

      parent: root,

      data: obj

    }

  ]

  let i = 0

  while (i < tmp.length) {

    const source = tmp[i++]

    const { data, parent } = source

    for (let o in data) {

      if (data.hasOwnProperty(o)) {

        if (isObject(data[o])) {

          const _cloned = tmp.find(source => source.data === data[o])

          if (_cloned) parent[o] = _cloned.parent

          else tmp.push({ parent: parent[o] = {}, data: data[o] })

        } else parent[o] = data[o]

      }

    }

  }

  return root

}

const a = { b: { a: { c: 1 } }, d: 8 }

a.a = a

a.b.b = a.b

const b = clone(a)

b.b.b.a = 1

b.a.d = 9

console.log(b)

console.log(a)

```