vue.config.js里面，像下面這樣寫(xiě)的，會(huì)把js文件編譯成一個(gè)個(gè)的chunk的js

// 不是dev的就不用編譯出runtime
    config
      .when(process.env.NODE_ENV !== 'dev',
        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()
// 下面就是把node_modules編譯出lib
          config
            .optimization.splitChunks({
              chunks: 'all',
              cacheGroups: {
                libs: {
                  name: 'chunk-libs',
                  test: /[\\/]node_modules[\\/]/,
                  priority: 10,
                  chunks: 'initial' // node_modules下面的第三方的庫(kù)(除了elementUI的，elementUI的chunk在下面)
                },
                elementUI: {
                  name: 'chunk-elementUI', // 把elementUI拆分到一個(gè)單獨(dú)的文件里面
                  priority: 20, // 這個(gè)的優(yōu)先級(jí)高于lib
                  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')
        }

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默認(rèn)名稱(chēng)是不帶hash值的(只有production的時(shí)候會(huì))，如果希望帶hash值，把對(duì)于的env文件里面加上

NODE_ENV = production

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