rollup.config.js

import pjson from '@rollup/plugin-json';
import babel from '@rollup/plugin-babel';
import commonjs from '@rollup/plugin-commonjs';
import resolve from '@rollup/plugin-node-resolve';


const serverPlugins = [resolve(), pjson(), commonjs({ include: 'node_modules/**' })];
const clientPlugins = [resolve({ browser: true, preferBuiltins: false }), pjson(), commonjs({ include: 'node_modules/**' })];

export default [
    {
        // server build transpiled
        input: 'src/package/serverExports.js',
        external: ['fs', 'bufferutil', 'utf-8-validate'],
        output: { file: 'dist/server/lance-gg.js', format: 'cjs', name: 'Server', sourcemap: true },
        plugins: [... serverPlugins, babel({ exclude: '**/node_modules/**' })]
    },
    {
        // server build non-transpiled with es2015 modules
        input: 'src/package/serverExports.js',
        external: ['fs', 'bufferutil', 'utf-8-validate'],
        output: { file: 'dist/server-module/lance-gg.js', format: 'esm', name: 'Server' },
        plugins: serverPlugins
    },
    {
        // client build transpiled
        input: 'src/package/clientExports.js',
        output: { file: 'dist/client/lance-gg.js', format: 'umd', name: 'Client', sourcemap: true },
        plugins: [... clientPlugins, babel({ exclude: '**/node_modules/**' })]
    },
    {
        // client build non-transpiled with es2015 modules
        input: 'src/package/clientExports.js',
        output: { file: 'dist/client-module/lance-gg.js', format: 'umd', name: 'Client' },
        plugins: clientPlugins
    }
];