ReferenceError: “Promise” is not defined””

IE does not support promise solutions

//import
<script src = "https://cdn.polyfill.io/v2/polyfill.min.js"> </script> 
//or 
<script type="text/javascript" src ="https://cdn.polyfill.io/v2/polyfill.min.js?features=es6"></script>

Promise does not support iE

VUE project

(1) cnpm install –save babel-polyfill

(2) Add code require(“babel-polyfill”) in webpack.base.conf.js

(3) Add the code import “babel-polyfill” in main.js;

React project

(1) cnpm install –save babel-polyfill

(2) Add the code import “babel-polyfill” in the entry file (app.js/router.js);