兼容IE

babel.config.js module.exports = { presets: [['@vue/cli-plugin-babel/preset', {useBuiltIns: 'entry',}]], }

package.json

"babel-polyfill": "^6.26.0", "sockjs-client": "1.5.1",

"browserslist": [ "> 1%", "last 2 versions", "not ie <= 8" ]

src\main.js import 'babel-polyfill';