https://cdn.magazines.zoznam.sk/js/embed-auto-size.js

1(function() {
2	const articleEl = document.currentScript.parentNode;
3	const resize = function(iframe) {
4		if(iframe.matches('[id*="google_ads"], [src*="doubleclick.net"], [src*="googlesyndication"], [aria-label="Advertisement"], [srcdoc], [data-contents], .instagram-media')) return;
5		if(iframe.src.startsWith('https://www.facebook.com/') && iframe.src.match(/width=500/)) {
6			iframe.style.width = '100%';
7			iframe.src = iframe.src.replace(/width=500/, 'width=auto');
8			console.log('resize iframe(fb)', iframe.outerHTML);
9
10			return;
11		}
12		else if(iframe.matches('[id^="twitter-widget"]')) {
13			iframe.parentNode.style.margin = '0 auto';
14			return;
15		}
16
17		if(isNaN(iframe.width) || isNaN(iframe.height)) return;
18
19		iframe.style.aspectRatio = `${iframe.width}/${iframe.height}`;
20		iframe.style.width = '100%';
21		iframe.style.height = 'auto';
22		console.log('resize iframe', iframe.outerHTML);
23	}
24	const observer = new MutationObserver(function(records) {
25		for (const record of records) {
26			if (record.type !== 'childList' || record.addedNodes.length === 0) continue;
27
28			for(const el of record.addedNodes) {
29				const isIframe = el.nodeName === 'IFRAME';
30				if(!(isIframe || el.children?.length > 0)) continue;
31				const iframeEl = isIframe ? el : el.querySelector('iframe');
32				if(iframeEl) resize(iframeEl);
33			}
34		}
35	});
36	observer.observe(articleEl, { childList: true, subtree: true });
37})();