Webpack Code Splitting Tutorial 📦

Code splitting is a powerful technique to optimize your webpack build by dividing your code into smaller, manageable chunks. This improves load times and reduces initial bundle size. Let's explore key methods:

1. Entry Point Splitting

Define multiple entry points in your webpack.config.js to split code into separate bundles.

entry: {
  main: './src/index.js',
  vendor: './src/vendor.js'
}

2. Dynamic Imports

Use import() function to load modules on demand.

import('./module.js').then(mod => {
  mod.init();
});

3. SplitChunksPlugin

Automatically split common dependencies with SplitChunksPlugin.

optimization: {
  splitChunks: {
    chunks: 'all',
    name: 'vendors',
    minSize: 10000,
    maxSize: 0,
    minChunks: 1,
    maxChunks: 1,
    cacheGroups: {
      vendors: {
        test: /[\\/]node_modules[\\/]/,
        name: 'vendors',
        chunks: 'all'
      }
    }
  }
}

For deeper insights, check our Webpack Guide to understand how code splitting integrates with other optimization strategies. 🚀