css/css-contain/support/count-resizes.html - external/w3c/web-platform-tests - Git at Google

 <!doctype html>
 <div id="count">0</div>
 <script>
 let count = 0;
 function updateResizeCount() {
   document.getElementById("count").innerText = count;
 }

 updateResizeCount();
 addEventListener("resize", () => {
   count++;
   updateResizeCount();
 });
 </script>
	<!doctype html>
	<div id="count">0</div>
	<script>
	let count = 0;
	function updateResizeCount() {
	document.getElementById("count").innerText = count;
	}

	updateResizeCount();
	addEventListener("resize", () => {
	count++;
	updateResizeCount();
	});
	</script>