Error in created hook: "referenceerror:" promise "undefined“

In the beginning, I used VUE3、 After all, I haven't learned VUE3, Then get the project and start directly , It's done ！！！ So here comes the question ,IE The browser has nothing ！ Later I checked , original VUE3 Give up directly IE 了 , Split ！！！ Decisively turn to VUE2! It hurts after moving ！ Report this error again ！ also IE8 Following VUE2 It won't come out of the page ！

Solution ：

install web-pack-server ：npm install --save-dev webpack-server

install babel-polyfill rely on ： npm install --save babel-polyfill

main.js introduce ： import ‘babel-polyfill’

stay webpack.base.conf.js Join in require(“babel-polyfill”)

analysis ： In fact, it is an error reported by the kernel , First, locate the browser compatibility problem ,promise Callback not supported ,promise yes ES6 New features , in other words IE The kernel version is right es6 Compatibility is not friendly , Demotion is required to resolve ！