deemix-webui/rollup.config.js

import resolve from '@rollup/plugin-node-resolve'
import commonjs from '@rollup/plugin-commonjs'
import { terser } from 'rollup-plugin-terser'

// `npm run watch:js` -> `production` is false
// `npm run build:js` -> `production` is true
const production = !process.env.ROLLUP_WATCH

export default {
	input: 'src/js/app.js',
	output: [
		{
			file: 'public/js/bundle.js',
			format: 'module',
			sourcemap: true
		}
	],
	plugins: [
		resolve(), // Tells Rollup how to find imported modules in node_modules
		commonjs(), // Converts imported modules to ES modules, if necessary
		production && terser() // Minify, but only in production
	]
}