1.首先执行:npm install  jQuery --save-dev,在package.json里加入jQuery。

2.修改build下的webpack.base.conf.js

方法一:

首先加入:

const webpack = require("webpack")

然后在module.exports 对象中加入:

 

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

方法二:

先加入:

const webpack = require("webpack")

然后:

  resolve: {
    extensions: ['.js', '.vue', '.json'],
    alias: {
      'vue$': 'vue/dist/vue.esm.js',
      '@': resolve('src'),
      'jquery': 'jquery'
    }
  },

最后:

  plugins: [
    new webpack.ProvidePlugin({
      jQuery: "jquery",
      $: "jquery"
    })
  ]

3.在app.vue中调用jquery

  mounted: function() {
    console.log($);
    console.log($('#ss')[0].innerHTML);
  },

打印结果: