rollup.config.headless.mjs

import commonjs from '@rollup/plugin-commonjs';
import { nodeResolve } from '@rollup/plugin-node-resolve';
import replace from '@rollup/plugin-replace';
import typescript from '@rollup/plugin-typescript';

export default () => {
  let build = {
    //  Our game entry point (edit as required)
    input: ['./src/headless.ts'],

    //  Where the build file is to be generated.
    //  Most games being built for distribution can use iife as the module type.
    //  You can also use 'umd' if you need to ingest your game into another system.
    //  If using Phaser 3.21 or **below**, add: `intro: 'var global = window;'` to the output object.
    output: {
      file: './dist/headless.js',
      name: 'MyGame',
      format: 'cjs',
      sourcemap: true
    },

    external: ['xml2js'],

    plugins: [
      //  Toggle the booleans here to enable / disable Phaser 3 features:
      replace({
        preventAssignment: true,
        'INCLUDE_GRAPHICS: true': 'INCLUDE_GRAPHICS: false'
      }),

      //  Parse our .ts source files
      nodeResolve({
        extensions: ['.ts', '.tsx']
      }),

      //  We need to convert the Phaser 3 CJS modules into a format Rollup can use:
      commonjs({
        sourceMap: true,
        ignoreGlobal: true
      }),

      //  See https://github.com/rollup/plugins/tree/master/packages/typescript for config options
      typescript()
    ]
  };

  return build;
};