如何重写vue组件的方法（例如创建...）

Question

使用vue-cli创建演示

index.js代码

// The Vue build version to load with the `import` command
// (runtime-only or standalone) has been set in webpack.base.conf with an alias.
import Vue from 'vue'
import App from './App'

// not work !!!
App.created = function () {
    console.log(1231231232);   
}

Vue.config.productionTip = true

/* eslint-disable no-new */
new Vue({
  el: '#app',
  template: '<App/>',
  components: { App }
})

我不会t want to use延长`，因为它会执行两次