| <!DOCTYPE html> |
| <meta charset="utf-8"> |
| <title>CSS Test: scroll tracking for ::scroll-marker with direction: rtl</title> |
| <link rel="help" href="https://drafts.csswg.org/css-overflow-5/#scroll-container-scroll"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/css/css-transitions/support/helper.js"></script> |
| <style> |
| #scroller { |
| direction: rtl; |
| overflow: scroll; |
| width: 100px; |
| height: 150px; |
| white-space: nowrap; |
| scroll-marker-group: before; |
| } |
| |
| #scroller::scroll-marker-group { |
| border: 3px solid black; |
| display: flex; |
| width: 100px; |
| height: 20px; |
| } |
| |
| #scroller div { |
| border: 3px solid black; |
| background-color: blue; |
| display: inline-block; |
| margin: 10px; |
| width: 100px; |
| height: 100px; |
| } |
| |
| #scroller div::scroll-marker { |
| content: ''; |
| background-color: red; |
| width: 10px; |
| height: 10px; |
| border-radius: 50%; |
| } |
| |
| #scroller div::scroll-marker:target-current { |
| background-color: green; |
| } |
| |
| #target { |
| background-color: purple; |
| } |
| </style> |
| <div id='scroller'> |
| <div></div> |
| <div id='target'></div> |
| </div> |
| <script> |
| function assertPseudoElementProperty(originatingElement, pseudoType, backgroundColor) { |
| const pseudoStyle = getComputedStyle(originatingElement, pseudoType); |
| const pseudoBackgroundColor = pseudoStyle.getPropertyValue('background-color'); |
| assert_equals(pseudoBackgroundColor, backgroundColor, pseudoType + |
| " background-color should be " + backgroundColor.toString() + |
| " but was " + pseudoBackgroundColor.toString()); |
| } |
| promise_test(async () => { |
| await waitForAnimationFrames(2); |
| assertPseudoElementProperty(target, "::scroll-marker", "rgb(255, 0, 0)"); |
| }, "::scroll-marker is not activated when its originating element is not scrolled into the view"); |
| promise_test(async () => { |
| scroller.scrollLeft = -150; |
| await waitForAnimationFrames(2); |
| assertPseudoElementProperty(target, "::scroll-marker", "rgb(0, 128, 0)"); |
| }, "::scroll-marker is activated when its originating element is scrolled into the view"); |
| </script> |
