1324209.html - mozsearch

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<!DOCTYPE HTML>

<html>

<head>

<script type="application/javascript">

function crash() {

	var target1 = document.getElementById("target1");

	var target2 = document.getElementById("target2");

	var observer1 = new IntersectionObserver(function (entries) {

	  console.log(entries);

	  observer1.disconnect();

	  observer2.disconnect();

});

	var observer2 = new IntersectionObserver(function (entries) {

	  console.log(entries);

});

	observer1.observe(target1);

	observer2.observe(target2);

</script>

</head>

<body onload="crash()">

	<div id="target1" style="background: red; width: 50px; height: 50px"></div>

	<div id="target2" style="background: green; width: 50px; height: 50px"></div>

</body>

</html>