JS API to compile ReScript to JS

I’ve done this recently, but very hacky. so Svelte has the concept of pre-processors that take differently types of language like typescript, SCSS, Pug and turns it into JS, CSS and HTML in a preprocessing stage, so what’s roughly needed is way or documentation now how to turn Rescript code as string into JS as string, maybe a command that works with stdin and stdout. again below is very hacky but did work.

const rescriptPreprocess = () => {
	return {
		name: 'svelte-rescript',
		/**
		 * @param {object} options
		 * @param {string} options.content
		 * @param {string} options.filename
		 * @param {object} options.attributes
		 * @param {'res'} options.attributes.lang
		 */
		script: async ({ content, attributes }) => {
			if (attributes.lang == 'res') {

                console.info('content', content)

                const cmd = `./node_modules/.bin/bsc -bs-package-name svelte-rescript -bs-package-output esmodule:.:esmodule -o tmp -e "${content}"`;

				await promisify(exec)(cmd);

                const jsContent = readFileSync('tmpesmodule').toString();

				return {
					code: jsContent
				};
			}
		}
	};
};