basic.html - mozsearch

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

<!DOCTYPE html>

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

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

<style>

body { height: 4000px; }

div { height: 100px; }

</style>

<div id="block1">abc</div>

<div id="block2">def</div>

<script>

// Tests that growing an element above the viewport produces a scroll

// anchoring adjustment equal to the amount by which it grew.

test(() => {

  document.scrollingElement.scrollTop = 150;

  document.querySelector("#block1").style.height = "200px";

  assert_equals(document.scrollingElement.scrollTop, 250);

}, "Minimal scroll anchoring example.");

</script>