Webpack 4 – create vendor chunk

In order to reduce the vendor JS bundle size. We can split the node module packages into different bundle files. I referred this blog for splitting the bulky vendor file generated by Webpack. Gist of that link which I used initially:

optimization: {
  runtimeChunk: 'single',
  splitChunks: {
    chunks: 'all',
    maxInitialRequests: Infinity,
    minSize: 0,
    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('@', '')}`;
        },
      },
    },
  },
}

If one wants to group multiple packages and chunk then into different bundles then refer following gist.

optimization: {
  runtimeChunk: 'single',
  splitChunks: {
    chunks: 'all',
    maxInitialRequests: Infinity,
    minSize: 0,
    cacheGroups: {
      reactVendor: {
        test: /[\\/]node_modules[\\/](react|react-dom)[\\/]/,
        name: "reactvendor"
      },
      utilityVendor: {
        test: /[\\/]node_modules[\\/](lodash|moment|moment-timezone)[\\/]/,
        name: "utilityVendor"
      },
      bootstrapVendor: {
        test: /[\\/]node_modules[\\/](react-bootstrap)[\\/]/,
        name: "bootstrapVendor"
      },
      vendor: {
        test: /[\\/]node_modules[\\/](!react-bootstrap)(!lodash)(!moment)(!moment-timezone)[\\/]/,
        name: "vendor"
      },
    },
  },
}