vue 全局引用jq（打包后可能会遇到的问题）

Posted 2022-05-31 lst619247

问题描述：全局引用jquery打包到线上可能会不好使。

第一步：

var path = require(‘path‘)
var webpack = require(‘webpack‘)

function resolve(dir) 
  return path.join(__dirname, ‘..‘, dir)

module.exports = 
  entry: ‘./src/main.js‘,
  externals: 
    ‘BMap‘: ‘BMap‘,
    // ‘BMap_Symbol_SHAPE_POINT‘: ‘BMap_Symbol_SHAPE_POINT‘
  ,
  output: 
    path: path.resolve(__dirname, ‘./dist‘),
    publicPath: ‘/dist/‘,
    filename: ‘build.js‘
  ,
  module: 
    rules: [
      
        test: /\.css$/,
        use: [
          ‘vue-style-loader‘,
          ‘css-loader‘
        ],
      ,      
        test: /\.vue$/,
        loader: ‘vue-loader‘,
        options: 
          loaders: 
          
          // other vue-loader options go here
        
      ,
      
        test: /\.js$/,
        loader: ‘babel-loader‘,
        // include: [resolve(‘src‘), resolve(‘test‘),resolve(‘/node_modules/swiper/dist‘)]
        // include: [path.resolve(‘src‘), path.resolve(‘test‘),path.resolve(‘node_modules/bootstrap-vue/lib‘)],
        exclude: /node_modules/
      ,
      
        test: /\.(png|jpg|gif|svg)$/,
        loader: ‘file-loader‘,
        options: 
          name: ‘[name].[ext]?[hash]‘
        
      
    ]
  ,
  plugins: [ 
    new webpack.ProvidePlugin( 
          $:"jquery", 
          jQuery:"jquery", 
         "window.jQuery":"jquery",
 ) 
], 
  resolve: 
    alias: 
      ‘vue$‘: ‘vue/dist/vue.esm.js‘,
      // ‘@‘: resolves(‘src‘),
      ‘@‘: path.resolve(‘src‘),
      ‘swiper‘: ‘swiper/dist/js/swiper.js‘,
    ,
    extensions: [‘*‘, ‘.js‘, ‘.vue‘, ‘.json‘]
  ,
  devServer: 
    historyApiFallback: true,
    noInfo: true,
    overlay: true,
  ,
  performance: 
    hints: false
  ,
  devtool: ‘#eval-source-map‘


if (process.env.NODE_ENV === ‘production‘) 
  module.exports.devtool = ‘#source-map‘
  // http://vue-loader.vuejs.org/en/workflow/production.html
  module.exports.plugins = (module.exports.plugins || []).concat([
    new webpack.DefinePlugin(
      ‘process.env‘: 
        NODE_ENV: ‘"production"‘
      
    ),
    new webpack.optimize.UglifyJsPlugin(
      sourceMap: true,
      compress: 
        warnings: false
      
    ),
    new webpack.LoaderOptionsPlugin(
      minimize: true
    ),
    new webpack.ProvidePlugin( 
      $:"jquery", 
      jQuery:"jquery", 
     "window.jQuery":"jquery",
    ) 
  ])

View Code

第二部：在main.js里

import $ from ‘jquery‘;

解决问题：出现这个问题是只在plugins:里引入了没有在打包时候引用，要在生产环境里加上

new webpack.ProvidePlugin( 
      $:"jquery", 
      jQuery:"jquery", 
     "window.jQuery":"jquery",
    )