prisme-components-svelte/rollup.config.js

Svelte components for the Prisme Design System

import svelte from 'rollup-plugin-svelte';
import resolve from 'rollup-plugin-node-resolve';
import commonjs from 'rollup-plugin-commonjs';
import livereload from 'rollup-plugin-livereload';
import { terser } from 'rollup-plugin-terser';
import pkg from './package.json';

const production = !process.env.ROLLUP_WATCH;
const name = pkg.name
	.replace(/^(@\S+\/)?(svelte-)?(\S+)/, '$3')
	.replace(/^\w/, (m) => m.toUpperCase())
	.replace(/-\w/g, (m) => m[1].toUpperCase());

export default {
	input: !production ? 'src/main.js' : 'src/components/components.module.js',
	output: !production
		? {
				sourcemap: true,
				format: 'iife',
				name: 'app',
				file: 'public/bundle.js',
		  }
		: [
				{ file: 'dist/index.min.mjs', format: 'es' },
				{ file: 'dist/index.min.js', format: 'umd', name },
		  ],
	plugins: [
		svelte({
			// enable run-time checks when not in production
			dev: !production,
			// we'll extract any component CSS out into
			// a separate file — better for performance
			css: (css) => {
				css.write('public/bundle.css');
			},
		}),

		// If you have external dependencies installed from
		// npm, you'll most likely need these plugins. In
		// some cases you'll need additional configuration —
		// consult the documentation for details:
		// https://github.com/rollup/rollup-plugin-commonjs
		resolve(),
		commonjs(),

		// Watch the `public` directory and refresh the
		// browser on changes when not in production
		!production && livereload('public'),

		// If we're building for production (npm run build
		// instead of npm run dev), minify
		production && terser(),
	],
	watch: {
		clearScreen: false,
	},
};