chunck.js文件打包过大（优化）

config.optimization = {
            runtimeChunk: 'single',
            splitChunks: {
              chunks: 'all',
              maxInitialRequests: Infinity,
              minSize: 20000,
              cacheGroups: {
                vendor: {
                  test: /[\\/]node_modules[\\/]/,
                  name (module) {
                    // get the name. E.g. node_modules/packageName/not/this/part.js
                    // or node_modules/packageName
                    const packageName = module.context.match(/[\\/]node_modules[\\/](.*?)([\\/]|$)/)[1]
                    // npm package names are URL-safe, but some servers don't like @ symbols
                    return `npm.${packageName.replace('@', '')}`
                  }
                }
              }
            }
          };