svelte/test/sourcemaps/samples/preprocessed-markup/_config.js

import MagicString from 'magic-string';
import { magic_string_preprocessor_result, magic_string_replace_all } from '../../helpers';

export default {
	preprocess: {
		markup: ({ content, filename }) =>  {
			const src = new MagicString(content);
			magic_string_replace_all(src, 'baritone', 'bar');
			return magic_string_preprocessor_result(filename, src);
		}
	}
};