js 深度克隆

function deepClone(obj) {
  if (typeof obj !== 'object' || obj === null) {
    return obj
  }
  const result = Array.isArray(obj) ? [] : {}
  Object.setPrototypeOf(result, Object.getPrototypeOf(obj))
  for (const key in obj) {
    if (obj.hasOwnProperty(key)) {
      result[key] = deepClone(obj[key])
    }
  }
  return result
}


const obj1 = {
  a: 12,
  'b': [12, 232],
  c: {
    age: 12, name: 'howhy'
  }

}
console.log(deepClone(obj1))

 

    function deepClone(origin, target) {
      var target = target || {}
      for (var key in origin) {
        if (origin.hasOwnProperty(key)) {
          var item = origin[key]
          if (item !== null && typeof item == 'object') {
            if (Object.prototype.toString.call(item) === '[object Array]') {
              target[key] = []
            } else if (Object.prototype.toString.call(item) === '[object Object]') {
              target[key] = {}
            }
            deepClone(item, target[key])
          } else {
            target[key] = item
          }
        }
      }
      return target
    }
    tar = deepClone(ori)