The method of introducing jquery in vue-cli

First enter the webpack.base.conf.js file

添加var webpack = require("webpack")

Then add it to the following module.exports

plugins: [
    new webpack.optimize.CommonsChunkPlugin('common.js'),
    new webpack.ProvidePlugin({
    jQuery: "jquery",
    $: "jquery"
    })  
  ],

Then add "jquery": "^1.8.0" to dependencies in package.json;

Import jquery in main.js

import $ from 'jquery'

Finally, restart the project