ajaxGetStatusOfLinks.js

function ajaxGetStatusOfLinks(arrayOfLinks) {
	if (typeof arrayOfLinks == 'string') {
		arrayOfLinks = [arrayOfLinks];
	};
	let returnObjs = [];
	arrayOfLinks.forEach(function(link, i) {
		let xhttp = new XMLHttpRequest();
		xhttp.onreadystatechange = function() {
			if (this.status == 200 && this.readyState == 4) {
				returnObjs.push({
					'link': link,
					'status': 200
				});
			};
			if (this.status == 404 && this.readyState == 4) {
				returnObjs.push({
					'link': link,
					'status': 404
				});
			};
		};
		xhttp.open('GET', link, true);
		xhttp.send();
	});
	waitRetunsLength = setInterval(function() {
		let reOrder = [];
		if (returnObjs.length == arrayOfLinks.length) {
			clearInterval(waitRetunsLength);
			arrayOfLinks.forEach(function(link, i) {
				returnObjs.forEach(function(objLink, j) {
					if (objLink.link == link) {
						reOrder.push(objLink);
					};
				});
			});
			return reOrder;
		};
	}, 10);
};