testing/web-platform/tests/css/css-overflow/scroll-marker-group-snap-aligns-to-active-ref.html
author Florian Quèze <florian@queze.net>
Tue, 08 Jul 2025 20:48:53 +0000 (10 hours ago)
changeset 795809 b01190f141a12f4b506acb1f4476561c4b0f2407
parent 776282 46cc4c173d098a53e69a4bbf2a1f27313a862c37
permissions -rw-r--r--
Bug 1960567 - remove the last C++ and scriptable APIs to accumulate data to legacy telemetry histograms, r=chutten. Differential Revision: https://phabricator.services.mozilla.com/D255582
<!DOCTYPE html>
<html>
  <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-behavior: smooth;
      scroll-snap-type: x mandatory;
      counter-set: markeridx -1;
    }

    .scroll-marker-group {
      border: solid 1px black;
      height: 40px;
      width: 500px;
      display: grid;
      grid-auto-flow: column;
      justify-self: center;
      overflow-x: scroll;
      white-space: nowrap;
      scroll-snap-type: x mandatory;
    }

    .box {
      height: 400px;
      width: 50%;
      border: 1px solid;
      display: inline-block;
      margin-left: 100px;
      margin-right: 100px;
      scroll-snap-align: none;
      align-content: center;
      text-align: center;
      &::scroll-marker:target-current {
        background-color: green;
      }
    }

    .scroll-marker {
      content: counter(markeridx);
      counter-increment: markeridx;
      width: 20px;
      height: 20px;
      background-color: red;
      text-align: center;
      margin-right: 100px;
    }

    #box3 {
      scroll-snap-align: center;
    }
    #marker3 {
      scroll-snap-align: center;
    }

    .green {
      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>
    <div class="scroll-marker-group" id="marker-group">
      <div class="scroll-marker" id="marker0"><a href="#">0</a></div>
      <div class="scroll-marker" id="marker1"><a href="#">1</a></div>
      <div class="scroll-marker" id="marker2"><a href="#">2</a></div>
      <div class="green scroll-marker" id="marker3"><a href="#">3</a></div>
      <div class="scroll-marker" id="marker4"><a href="#">4</a></div>
      <div class="scroll-marker" id="marker5"><a href="#">5</a></div>
      <div class="scroll-marker" id="marker6"><a href="#">6</a></div>
      <div class="scroll-marker" id="marker7"><a href="#">7</a></div>
      <div class="scroll-marker" id="marker8"><a href="#">8</a></div>
      <div class="scroll-marker" id="marker9"><a href="#">9</a></div>
      <div class="scroll-marker" id="marker10"><a href="#">10</a></div>
      <div class="scroll-marker" id="marker11"><a href="#">11</a></div>
      <div class="scroll-marker" id="marker12"><a href="#">12</a></div>
      <div class="scroll-marker" id="marker13"><a href="#">13</a></div>
      <div class="scroll-marker" id="marker14"><a href="#">14</a></div>
      <div class="scroll-marker" id="marker15"><a href="#">15</a></div>
    </div>
  </body>
</html>