Make ::backdrop stay in top layer while animating out

This patch adds a new internal pseudo class which matches popovers while they are still in the top layer after they have been closed in order to also make the corresponding ::backdrop stay in the top layer. This is based on futhark's patch: https://chromium-review.googlesource.com/c/chromium/src/+/4554016 Fixed: 1449145 Change-Id: I8e4831e960c5d18fb077f023c119fd0e678541df
web-platform-tests · Jun 3, 2023 · 5c46a62 · 5c46a62
1 parent 5a8d833
commit 5c46a62
Showing 1 changed file with 19 additions and 0 deletions.
diff --git a/css/css-position/overlay/overlay-transition-backdrop.html b/css/css-position/overlay/overlay-transition-backdrop.html
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+3<!DOCTYPE html>
+<title>CSS Position Test: overlay transition with ::backdrop</title>
+<link rel="help" href="https://drafts.csswg.org/css-position-4/#overlay">
+<link rel="match" href="green-ref.html">
+<style>
+  [popover] {
+    display: block;
+    visibility: hidden;
+    transition: overlay 60s step-end;
+  }
+  [popover]::backdrop {
+    background-color: green;
+  }
+</style>
+<div popover id="foo"></div>
+<script>
+  foo.showPopover();
+  foo.hidePopover();
+</script>