Remove Stylesheet with MutationObserver

removeStylesheet.js

export default function(reg) {
	// select the target node
	const HEAD = document.querySelector('head');
	// configuration of the observer:
	const CONFIG = { attributes: false, childList: true, characterData: false };

	// create an observer instance
	const observer = new MutationObserver(mutations => {
		mutations.forEach(mutation => {
			const node = mutation.addedNodes[0];
			if (node && reg.test(node.href)) {
				node.parentNode.removeChild(node);
				// stop observing
				observer.disconnect();
			}
		});
	});

	// pass in the target node, as well as the observer options
	observer.observe(HEAD, CONFIG);
}