在vue中使用jq或者第三方插件

1.安装jQuery

npm i jquery -S

2.修改webpack的配置文件

文件目录及名称：build/webpack.base.conf.js

注释代码为修改部分

\'use strict\'
const path = require(\'path\')
const utils = require(\'./utils\')
const config = require(\'../config\')
const vueLoaderConfig = require(\'./vue-loader.conf\')
const webpack = require(\'webpack\')  //这里引入webpack

function resolve (dir) {
  return path.join(__dirname, \'..\', dir)
}



module.exports = {
  context: path.resolve(__dirname, \'../\'),
  entry: {
    app: \'./src/main.js\'
  },
  output: {
    path: config.build.assetsRoot,
    filename: \'[name].js\',
    publicPath: process.env.NODE_ENV === \'production\'
      ? config.build.assetsPublicPath
      : config.dev.assetsPublicPath
  },
  resolve: {
    extensions: [\'.js\', \'.vue\', \'.json\'],
    alias: {
      \'vue$\': \'vue/dist/vue.esm.js\',
      \'@\': resolve(\'src\'),

           // 如果是自己下载的jq文件，则用下面方式修改为存放目录
          // \'jquery\': path.resolve(__dirname, \'../src/assets/libs/jquery/jquery.min\'),
          // 如果使用NPM安装的jQuery，则直接引入即可
      \'jquery\': \'jquery\' 
    }
  },
  module: {
    rules: [
      {
        test: /\.vue$/,
        loader: \'vue-loader\',
        options: vueLoaderConfig
      },
      {
        test: /\.js$/,
        loader: \'babel-loader\',
        include: [resolve(\'src\'), resolve(\'test\'), resolve(\'node_modules/webpack-dev-server/client\')]
      },
      {
        test: /\.(png|jpe?g|gif|svg)(\?.*)?$/,
        loader: \'url-loader\',
        options: {
          limit: 10000,
          name: utils.assetsPath(\'img/[name].[hash:7].[ext]\')
        }
      },
      {
        test: /\.(mp4|webm|ogg|mp3|wav|flac|aac)(\?.*)?$/,
        loader: \'url-loader\',
        options: {
          limit: 10000,
          name: utils.assetsPath(\'media/[name].[hash:7].[ext]\')
        }
      },
      {
        test: /\.(woff2?|eot|ttf|otf)(\?.*)?$/,
        loader: \'url-loader\',
        options: {
          limit: 10000,
          name: utils.assetsPath(\'fonts/[name].[hash:7].[ext]\')
        }
      }
    ]
  },
  node: {
    // prevent webpack from injecting useless setImmediate polyfill because Vue
    // source contains it (although only uses it if it\'s native).
    setImmediate: false,
    // prevent webpack from injecting mocks to Node native modules
    // that does not make sense for the client
    dgram: \'empty\',
    fs: \'empty\',
    net: \'empty\',
    tls: \'empty\',
    child_process: \'empty\'
  },
//在最后添加一个plugins配置
  plugins: [
    new webpack.ProvidePlugin({
        $: "jquery",
        jQuery: "jquery"
    })
 ],
}

在组件中使用jquery

<script>
//引入jquery就可以使用了
import $ from \'jquery\'
export default {
  name: \'HelloWorld\',
  data () {
    return {
      msg: \'Welcome to Your Vue.js App\'
    }
  },
  created(){
     //已经能打印出来了
    console.log($)
  }
}
</script>