gecko-dev/layout/reftests/details-summary/key-enter-prevent-default.html

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HTML

<!DOCTYPE html>
<!-- Any copyright is dedicated to the Public Domain.
- http://creativecommons.org/publicdomain/zero/1.0/ -->
<html class="reftest-wait">
<script>
function runTest() {
var summary = document.getElementById("summary");
summary.addEventListener('click', function(e) {
// Prevent the details from toggling by key events.
e.preventDefault();
});
// Dispatch 'return' key to the summary element.
summary.dispatchEvent(new KeyboardEvent("keypress", {"keyCode": 13}));
document.documentElement.removeAttribute("class");
}
</script>
<body onload="runTest();">
<details>
<summary id="summary">Summary</summary>
<p>This is the details.</p>
</details>
</body>
</html>