karma-rolldown-preprocessor

Karma preprocessor to bundle ES modules using Rolldown.

Fork of karma-rollup-preprocessor with Rolldown based implementation from Discord comment by Jeremy Scheff.

Install

npm install karma-rolldown-preprocessor --save-dev

Usage

All the options detailed in the Rolldown documentation can be passed to rolldownPreprocessor.

// karma.conf.js
export default function (config) {
	config.set({
		files: [
			/**
			 * Make sure to disable Karma’s file watcher
			 * because the preprocessor will use its own.
			 */
			{ pattern: 'test/**/*.spec.js', watched: false }
		],
		preprocessors: {
			'test/**/*.spec.js': ['rolldown']
		},
		rolldownPreprocessor: {
			/**
			 * This is just a normal Rolldown config object,
			 * except that `input` is handled for you.
			 */
			output: {
				format: 'iife', // Helps prevent naming collisions.
				name: '<your_project>', // Required for 'iife' format.
				sourcemap: 'inline' // Sensible for testing.
			}
		}
	});
}

License

MIT © Ivan Nikolić