Vue2 数组部分方法代理

var arr = [1, 2, 3]
var temp = Array.prototype
var arrM = Object.create(temp)
arrM.push = function(...args) {
    console.log(this)
    let result = temp.push.apply(this, args)
    console.log(1)
    return result
}
arr.__proto__ = arrM
arr.push(4)
arr