| <!DOCTYPE html> |
| <html class="reftest-wait"> |
| <head> |
| <title>CSS Test: active :scroll-markers is snap-aligned when scroll-marker-group is scrollable </title> |
| <link rel="help" href="https://drafts.csswg.org/css-overflow-5/#active-scroll-marker"> |
| <link rel="match" href="scroll-marker-group-snap-aligns-to-active-ref.html"> |
| <script src="/css/css-transitions/support/helper.js"></script> |
| <script src="/dom/events/scrolling/scroll_support.js"></script> |
| <script src="/common/reftest-wait.js"></script> |
| </head> |
| <body> |
| <style> |
| * { |
| margin: 0px; |
| } |
| .scroller { |
| height: 500px; |
| width: 80vw; |
| border: solid 1px; |
| overflow-x: scroll; |
| justify-self: center; |
| white-space: nowrap; |
| padding-top: 50px; |
| scroll-snap-type: x mandatory; |
| scroll-marker-group: after; |
| &::scroll-marker-group { |
| border: solid 1px black; |
| height: 40px; |
| width: 500px; |
| display: grid; |
| scroll-snap-type: x mandatory; |
| grid-auto-flow: column; |
| justify-self: center; |
| overflow-x: scroll; |
| white-space: nowrap; |
| } |
| counter-set: markeridx -1; |
| } |
| |
| .box { |
| height: 400px; |
| width: 50%; |
| border: 1px solid; |
| display: inline-block; |
| margin-left: 100px; |
| margin-right: 100px; |
| scroll-snap-align: center; |
| align-content: center; |
| text-align: center; |
| &::scroll-marker { |
| content: counter(markeridx); |
| counter-increment: markeridx; |
| width: 20px; |
| height: 20px; |
| background-color: red; |
| margin-right: 100px; |
| scroll-snap-align: center; |
| } |
| &::scroll-marker:target-current { |
| background-color: green; |
| } |
| } |
| |
| </style> |
| <div class="scroller" id="carousel"> |
| <div class="box" id="box0"><p>0</p></div> |
| <div class="box" id="box1"><p>1</p></div> |
| <div class="box" id="box2"><p>2</p></div> |
| <div class="box" id="box3"><p>3</p></div> |
| <div class="box" id="box4"><p>4</p></div> |
| <div class="box" id="box5"><p>5</p></div> |
| <div class="box" id="box6"><p>6</p></div> |
| <div class="box" id="box7"><p>7</p></div> |
| <div class="box" id="box8"><p>8</p></div> |
| <div class="box" id="box9"><p>9</p></div> |
| <div class="box" id="box10"><p>10</p></div> |
| <div class="box" id="box11"><p>11</p></div> |
| <div class="box" id="box12"><p>12</p></div> |
| <div class="box" id="box13"><p>13</p></div> |
| <div class="box" id="box14"><p>14</p></div> |
| <div class="box" id="box15"><p>15</p></div> |
| </div> |
| <script> |
| async function runTest() { |
| const scrollend_promise = |
| waitForScrollEndFallbackToDelayWithoutScrollEvent(carousel); |
| // When box3 is scrolled into view, the scroll-marker-group should scroll |
| // to ensure that its corresponding marker is scrolled into view. |
| box3.scrollIntoView(); |
| await scrollend_promise; |
| takeScreenshot(); |
| } |
| waitForCompositorReady().then(runTest); |
| </script> |
| </body> |
| </html> |
