opt-out.html - mozsearch

Enable keyboard shortcuts

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

<!DOCTYPE html>

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

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

<style>

body { height: 2000px; overflow-anchor: none; }

#scroller { overflow: scroll; width: 500px; height: 300px; }

.anchor {

  position:relative; height: 100px; width: 150px;

  background-color: #afa; border: 1px solid gray;

#forceScrolling { height: 500px; background-color: #fcc; }

</style>

<div id="outerChanger"></div>

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

<div id="scroller">

  <div id="innerChanger"></div>

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

  <div id="forceScrolling"></div>

</div>

<script>

// Tests that scroll anchoring can be disabled per-scroller with the

// overflow-anchor property.

var divScroller = document.querySelector("#scroller");

var docScroller = document.scrollingElement;

var innerChanger = document.querySelector("#innerChanger");

var outerChanger = document.querySelector("#outerChanger");

function setup() {

  divScroller.scrollTop = 100;

  docScroller.scrollTop = 100;

  innerChanger.style.height = "200px";

  outerChanger.style.height = "150px";

function reset() {

  document.body.style.overflowAnchor = "";

  divScroller.style.overflowAnchor = "";

  divScroller.scrollTop = 0;

  docScroller.scrollTop = 0;

  innerChanger.style.height = "";

  outerChanger.style.height = "";

test(() => {

  setup();

  assert_equals(divScroller.scrollTop, 300,

      "Scroll anchoring should apply to #scroller.");

  assert_equals(docScroller.scrollTop, 100,

      "Scroll anchoring should not apply to the document scroller.");

  reset();

}, "Disabled on document, enabled on div.");

test(() => {

  document.body.style.overflowAnchor = "auto";

  divScroller.style.overflowAnchor = "none";

  setup();

  assert_equals(divScroller.scrollTop, 100,

      "Scroll anchoring should not apply to #scroller.");

  assert_equals(docScroller.scrollTop, 250,

      "Scroll anchoring should apply to the document scroller.");

  reset();

}, "Enabled on document, disabled on div.");

</script>