scroll-marker-group-snap-aligns-to-active.tentative.html (3086B)
1 <!DOCTYPE html> 2 <html class="reftest-wait"> 3 <head> 4 <title>CSS Test: active :scroll-markers is snap-aligned when scroll-marker-group is scrollable </title> 5 <link rel="help" href="https://drafts.csswg.org/css-overflow-5/#active-scroll-marker"> 6 <link rel="match" href="scroll-marker-group-snap-aligns-to-active-ref.html"> 7 <script src="/css/css-transitions/support/helper.js"></script> 8 <script src="/dom/events/scrolling/scroll_support.js"></script> 9 <script src="/common/reftest-wait.js"></script> 10 </head> 11 <body> 12 <style> 13 * { 14 margin: 0px; 15 } 16 .scroller { 17 height: 500px; 18 width: 80vw; 19 border: solid 1px; 20 overflow-x: scroll; 21 justify-self: center; 22 white-space: nowrap; 23 padding-top: 50px; 24 scroll-snap-type: x mandatory; 25 scroll-marker-group: after; 26 &::scroll-marker-group { 27 border: solid 1px black; 28 height: 40px; 29 width: 500px; 30 display: grid; 31 scroll-snap-type: x mandatory; 32 grid-auto-flow: column; 33 justify-self: center; 34 overflow-x: scroll; 35 white-space: nowrap; 36 } 37 counter-set: markeridx -1; 38 } 39 40 .box { 41 height: 400px; 42 width: 50%; 43 border: 1px solid; 44 display: inline-block; 45 margin-left: 100px; 46 margin-right: 100px; 47 scroll-snap-align: center; 48 align-content: center; 49 text-align: center; 50 &::scroll-marker { 51 content: counter(markeridx); 52 counter-increment: markeridx; 53 width: 20px; 54 height: 20px; 55 background-color: red; 56 margin-right: 100px; 57 scroll-snap-align: center; 58 } 59 &::scroll-marker:target-current { 60 background-color: green; 61 } 62 } 63 64 </style> 65 <div class="scroller" id="carousel"> 66 <div class="box" id="box0"><p>0</p></div> 67 <div class="box" id="box1"><p>1</p></div> 68 <div class="box" id="box2"><p>2</p></div> 69 <div class="box" id="box3"><p>3</p></div> 70 <div class="box" id="box4"><p>4</p></div> 71 <div class="box" id="box5"><p>5</p></div> 72 <div class="box" id="box6"><p>6</p></div> 73 <div class="box" id="box7"><p>7</p></div> 74 <div class="box" id="box8"><p>8</p></div> 75 <div class="box" id="box9"><p>9</p></div> 76 <div class="box" id="box10"><p>10</p></div> 77 <div class="box" id="box11"><p>11</p></div> 78 <div class="box" id="box12"><p>12</p></div> 79 <div class="box" id="box13"><p>13</p></div> 80 <div class="box" id="box14"><p>14</p></div> 81 <div class="box" id="box15"><p>15</p></div> 82 </div> 83 <script> 84 async function runTest() { 85 const scrollend_promise = 86 waitForScrollEndFallbackToDelayWithoutScrollEvent(carousel); 87 // When box3 is scrolled into view, the scroll-marker-group should scroll 88 // to ensure that its corresponding marker is scrolled into view. 89 box3.scrollIntoView(); 90 await scrollend_promise; 91 takeScreenshot(); 92 } 93 waitForCompositorReady().then(runTest); 94 </script> 95 </body> 96 </html>