async function load_text(content) {
	const sheet = new CSSStyleSheet();
	await sheet.replace(content);
	return sheet;
}

async function load_file(url) {
	const response = await fetch(url);
	const content = await response.text();
	return await load_text(content);
}

export async function sheet(...contents) {
	return await Promise.all(contents.map(text => load_text(text)));
}

export async function file(base, ...urls) {
	return await Promise.all(urls.map(url => load_file(new URL(url, base))))
}