<html>
<head>
<style>
    div { -webkit-animation-trigger : container-scroll(20px); }
</style>
<script>
if (window.testRunner)
    testRunner.dumpAsText();
function run() {
    document.getElementById("test").focus();
    document.execCommand('insertHTML', false, '<div id="insertedDiv" style="-webkit-animation-trigger : container-scroll(20px); "></div>');
}
</script>
</head>
<body onload="run()">
<p>This test verifies that comparing two CSSAnimationTriggerScrollValues without end values does not crash.</p>
<div id="test" contenteditable></div>
</body>
</html>