rollup.config.js

import pkg from './package.json';
import nodePolyfills from 'rollup-plugin-polyfill-node';
import { nodeResolve } from '@rollup/plugin-node-resolve';
import typescript from '@rollup/plugin-typescript';
import commonjs from '@rollup/plugin-commonjs';
import { visualizer } from 'rollup-plugin-visualizer';

const nodePlugins = [
	commonjs({
		include: /node_modules/,
	}),
	nodeResolve(),
	typescript({
		tsconfig: './tsconfig.build.json',
	}),
	process.env.ANALYSE_BUNDLE && visualizer(),
];

const browserPlugins = [
	commonjs({
		include: /node_modules/,
	}),
	nodePolyfills({
		include: null,
	}),
	nodeResolve({
		browser: true,
	}),
	typescript({
		tsconfig: './tsconfig.build.json',
	}),
	process.env.ANALYSE_BUNDLE && visualizer(),
];

const nodeExternals = [
	'@serialport/bindings-cpp',
	'@serialport/parser-regex',
	'serialport',
];

export default [
	// ES module build for Node
	{
		input: './src/index.ts',
		output: {
			file: pkg.module,
			format: 'esm',
			exports: 'named',
			sourcemap: true,
		},
		plugins: nodePlugins,
		external: nodeExternals,
	},
	// CommonJS build for Node
	{
		input: './src/index.ts',
		output: {
			file: pkg.main,
			format: 'cjs',
			exports: 'named',
			sourcemap: true,
		},
		plugins: nodePlugins,
		external: nodeExternals,
	},
	// ES module build for Browsers
	{
		input: './src/index.browser.ts',
		output: {
			file: pkg.browser[pkg.module],
			format: 'esm',
			exports: 'named',
			sourcemap: true,
		},
		plugins: browserPlugins,
	},
	// CommonJS build for Browsers
	{
		input: './src/index.browser.ts',
		output: {
			file: pkg.browser[pkg.main],
			format: 'cjs',
			exports: 'named',
			sourcemap: true,
		},
		plugins: browserPlugins,
	},
];