File: get-computed-style-crash.html

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<!DOCTYPE html>
<title>getComputedStyle without transition should not crash</title>
<link rel="help" href="https://drafts.csswg.org/css-view-transitions-1">
<link rel="author" href="mailto:vmpstr@chromium.org">

<body onload="start();">

<script>
async function start() {
 var el = document.createElement(undefined);
 document.body.appendChild(el);

 var style = self.getComputedStyle(el, ':view-transition');
 style.getPropertyValue("--child");
}
</script>