vue数组方法 复制对象

在main.js写

// eslint-disable-next-line no-extend-native
Array.prototype.indexOf = function (val) {
  for (let i = 0; i < this.length; i++) {
    if (this[i] === val) return i
  }
  return -1
}
// eslint-disable-next-line no-extend-native
Array.prototype.remove = function (val) {
  let index = this.indexOf(val)
  if (index > -1) {
    this.splice(index, 1)
  }
}

复制对象

Vue.prototype.clone = function (obj) {
  var copy = (obj instanceof Array) ? [] : {}
  for (let attr in obj) {
    if (!obj.hasOwnProperty(attr)) continue
    copy[attr] = (typeof obj[attr] === 'object') ? this.clone(obj[attr]) : obj[attr]
  }
  return copy
}

调用
this.clone(obj)