| <!doctype html> |
| <meta charset="utf-8"> |
| <title>CSS Test: scroll tracking for ::scroll-marker </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="/resources/testdriver.js"></script> |
| <script src="/resources/testdriver-actions.js"></script> |
| <script src="/resources/testdriver-vendor.js"></script> |
| <script src="/css/css-transitions/support/helper.js"></script> |
| <style> |
| * { |
| padding: 0; |
| margin: 0; |
| } |
| |
| #scroller { |
| overflow: scroll; |
| scroll-marker-group: before; |
| height: 100px; |
| } |
| |
| #scroller::scroll-marker-group { |
| border: 3px solid black; |
| display: flex; |
| width: 100px; |
| height: 20px; |
| } |
| |
| #scroller div { |
| width: 100px; |
| height: 100px; |
| } |
| |
| #scroller div::scroll-marker { |
| content: ""; |
| background-color: red; |
| display: inline-flex; |
| width: 10px; |
| height: 10px; |
| border-radius: 50%; |
| } |
| |
| #scroller div::scroll-marker:target-current { |
| background-color: green; |
| } |
| |
| #scroller div::scroll-marker:focus { |
| opacity: 0.5; |
| } |
| </style> |
| <div id="scroller"> |
| <div></div> |
| <div id="target"></div> |
| </div> |
| <script> |
| function assertPseudoElementProperty(originatingElement, pseudoType, opacity) { |
| const pseudoStyle = getComputedStyle(originatingElement, pseudoType); |
| const pseudoOpacity = pseudoStyle.getPropertyValue("opacity"); |
| assert_equals(pseudoOpacity, opacity, pseudoType + |
| " opacity should be " + opacity.toString() + |
| " but was " + pseudoOpacity.toString()); |
| } |
| promise_test(async () => { |
| scroller.scrollTop = 150; |
| assertPseudoElementProperty(target, "::scroll-marker", "1"); |
| }, "active ::scroll-marker doesn't have focus on scroll if previous ::scroll-marker didn't have it"); |
| promise_test(async () => { |
| /* Click the first ::scroll-marker to give it focus. */ |
| let actions_promise = new test_driver.Actions() |
| .pointerMove(7, 7) |
| .pointerDown() |
| .pointerUp() |
| .pointerDown() |
| .pointerUp() |
| .send(); |
| await actions_promise; |
| await waitForAnimationFrames(2); |
| scroller.scrollTop = 150; |
| await waitForAnimationFrames(2); |
| assertPseudoElementProperty(target, "::scroll-marker", "0.5"); |
| }, "active ::scroll-marker saves focus on scroll if previous ::scroll-marker had it"); |
| </script> |
