AlwaysKillSticky/contentScript.js

window.onload = () => {
	chrome.storage.sync.get([ "matchingPatterns", "exclusionPatterns", "mode" ],
	(result) => {
		killStickyIfMatch(result);
	});
};

function killStickyIfMatch(result) {
	if (typeof result.matchingPatterns == "undefined") return;

	var killSticky = false;
	let matchingPatterns = result.mode == "whitelist" ?
						   [ ".*" ] :
						   result.matchingPatterns.split("\n");
	for (let pattern of matchingPatterns) {
		if (location.href.match(new RegExp(pattern))) {
			killSticky = true;
			break;
		}
	}
	let exclusionPatterns = (typeof result.exclusionPatterns != "undefined" &&
							 result.exclusionPatterns != "") ?
							result.exclusionPatterns.split("\n") :
							[ ];
	for (let pattern of exclusionPatterns) {
		if (location.href.match(new RegExp(pattern))) {
			killSticky = false;
			break;
		}
	}
	if (!killSticky) return;
	
	console.log("Killing all stickies!");
	document.querySelectorAll('body *').forEach(element => {
		if (getComputedStyle(element).position === 'fixed' || 
			getComputedStyle(element).position === 'sticky') {
			element.remove();
		}
	});
}