css/css-overscroll-behavior/overscroll-behavior-logical.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>Test flow-relative versions of overscroll-behavior properties</title>
<link rel="author" title="Majid Valipour">
<link rel="help" href="https://drafts.csswg.org/css-overscroll-behavior-1/#overscroll-behavior-longhands-logical">
<link rel="help" href="https://drafts.csswg.org/css-logical/#box">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
div {
  overscroll-behavior-block: contain;
  overscroll-behavior-inline: none;
}
#horizontal {
  writing-mode: horizontal-tb;
}
#vertical {
  writing-mode: vertical-rl;
}
#horizontalreversed {
  writing-mode: horizontal-tb;
  direction: rtl;
}
</style>
<body>
  <div id="horizontal"></div>
  <div id="vertical"></div>
  <div id="horizontalreversed"></div>
</body>

<script>
test(function() {
  var element = document.getElementById("horizontal");
  assert_equals(getComputedStyle(element).overscrollBehaviorX, "none");
  assert_equals(getComputedStyle(element).overscrollBehaviorY, "contain");
}, "Logical overscroll-behavior maps correctly when element has horizontal-tb writing mode");

test(function() {
  var element = document.getElementById("vertical");
  assert_equals(getComputedStyle(element).overscrollBehaviorX, "contain");
  assert_equals(getComputedStyle(element).overscrollBehaviorY, "none");
}, "Logical overscroll-behavior maps correctly when element has vertical-rl writing mode");

test(function() {
  var element = document.getElementById("horizontalreversed");
  assert_equals(getComputedStyle(element).overscrollBehaviorX, "none");
  assert_equals(getComputedStyle(element).overscrollBehaviorY, "contain");
}, "Logical overscroll-behavior maps correctly when element has horizontal-tb writing mode and is not affected by rtl direction");
</script>