vue.config.js

'use strict'
const path = require('path')

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

module.exports = {
  assetsDir: 'static',
  lintOnSave: process.env.NODE_ENV === 'development',
  productionSourceMap: false,

  devServer: {
    open: true,
    proxy: {
      '/': {
        target: 'http://gitlab.cmiovcd.com:3000/mock/53',
        changeOrigin: true
      }
    }
  },

  chainWebpack: config => {
    config.plugins.delete('preload').delete('prefetch')

    config.resolve.symlinks(true)

    config.resolve.alias.set('@', resolve('src')).end()

    // config.module
    //   .rule('images')
    //   .use('image-webpack-loader')
    //   .loader('image-webpack-loader')
    //   .options({
    //     bypassOnDebug: true
    //   })
    //   .end()

    // set svg-sprite-loader
    config.module
      .rule('svg')
      .exclude.add(resolve('src/icons'))
      .end()
    config.module
      .rule('icons')
      .test(/\.svg$/)
      .include.add(resolve('src/icons'))
      .end()
      .use('svg-sprite-loader')
      .loader('svg-sprite-loader')
      .options({
        symbolId: 'icon-[name]'
      })
      .end()

    // set preserveWhitespace
    config.module
      .rule('vue')
      .use('vue-loader')
      .loader('vue-loader')
      .tap(options => {
        options.compilerOptions.preserveWhitespace = true
        return options
      })
      .end()

    config.when(process.env.NODE_ENV === 'development', config =>
      config.devtool('cheap-source-map')
    )

    config.when(process.env.NODE_ENV !== 'development', config => {
      config
        .plugin('ScriptExtHtmlWebpackPlugin')
        .after('html')
        .use('script-ext-html-webpack-plugin', [
          {
            // `runtime` must same as runtimeChunk name. default is `runtime`
            inline: /runtime\..*\.js$/
          }
        ])
        .end()
      config
        .plugin('CompressionWebpackPlugin')
        .use('compression-webpack-plugin')
        .tap(() => [
          {
            test: /\.js$|\.css$/,
            threshold: 10240,
            minRatio: 0.8
          }
        ])
        .end()
      config.optimization.splitChunks({
        chunks: 'all',
        cacheGroups: {
          libs: {
            name: 'chunk-libs',
            test: /[\\/]node_modules[\\/]/,
            priority: 10,
            chunks: 'initial' // only package third parties that are initially dependent
          },
          elementUI: {
            name: 'chunk-elementUI', // split elementUI into a single package
            priority: 20, // the weight needs to be larger than libs and app or it will be packaged into libs or app
            test: /[\\/]node_modules[\\/]_?element-ui(.*)/ // in order to adapt to cnpm
          },
          commons: {
            name: 'chunk-commons',
            test: resolve('src/components'), // can customize your rules
            minChunks: 3, //  minimum common number
            priority: 5,
            reuseExistingChunk: true
          }
        }
      })
      config.optimization.runtimeChunk('single')
    })
  }
}