anchoring-with-bounds-clamping.html

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This WPT test may be referenced by the following Test IDs:
- /css/css-scroll-anchoring/anchoring-with-bounds-clamping.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<style>

#changer { height: 1500px; }

#anchor {

  width: 150px;

  height: 4000px;

  background-color: pink;

</style>

<div id="changer"></div>

<div id="anchor"></div>

<script>

// Test that scroll anchoring interacts correctly with scroll bounds clamping:

// There should be no visible jump even if the content shrinks such that the

// new max scroll position is less than the previous scroll position.

test(() => {

  document.scrollingElement.scrollTop = 1600;

  document.querySelector("#changer").style.height = "0";

  assert_equals(document.scrollingElement.scrollTop, 100);

}, "Anchoring combined with scroll bounds clamping in the document.");

</script>