backdrop-dynamic-display-none.html

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This WPT test may be referenced by the following Test IDs:
- /html/semantics/interactive-elements/the-dialog-element/backdrop-dynamic-display-none.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

<title>Test that adding display: none; dynamically on ::backdrop makes it disappear</title>

<meta charset="utf-8">

<link rel="author" title="Tim Nguyen" href="https://github.com/nt1m">

<link rel="match" href="backdrop-dynamic-display-none-ref.html">

<link rel="help" href="https://fullscreen.spec.whatwg.org/#new-stacking-layer">

<p>Test passes if there is no red.</p>

<dialog></dialog>

<style>

dialog { visibility: hidden; }

::backdrop { background-color: red; }

.hidden-backdrop::backdrop {

    display: none;

</style>

<script>

dialog = document.querySelector("dialog");

dialog.showModal();

requestAnimationFrame(() => {

    dialog.classList.add("hidden-backdrop");

});

</script>

</html>