#RuntimeChunkPlugin

RuntimeChunkPlugin creates separate runtime chunks and controls how they are named. optimization.runtimeChunk applies this plugin internally.

#Options

#name

Used to configure the name of the runtime chunk; it can be a string or a function that returns a string, where the function parameter is the name of the entry.

• Type: string | ((entrypoint: { name: string }) => string)

new rspack.optimize.RuntimeChunkPlugin({
  name: ({ name }) => `runtime~${name}`,
});

#Example

This configuration extracts the runtime used by two entry points into runtime.js:

import { rspack } from '@rspack/core';

export default {
  entry: {
    app: './src/app.js',
    admin: './src/admin.js',
  },
  output: {
    filename: '[name].js',
  },
  plugins: [
    new rspack.optimize.RuntimeChunkPlugin({
      name: 'runtime',
    }),
  ],
};

Rspack emits app.js, admin.js, and the shared runtime.js. Keeping the runtime separate allows entry bundles to be cached independently from runtime changes.