Blitz - WPT: scroll-marker-group-keeps-active-in-view.html

wpt / css / css-overflow / scroll-markers / scroll-marker-group-keeps-active-in-view.html

/css/css-overflow/scroll-markers/scroll-marker-group-keeps-active-in-view.html

<!DOCTYPE html>
<html class="reftest-wait">
  <head>
    <title>CSS Test: scroll tracking for ::scroll-markers 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-keeps-active-in-view-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>
    .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;
        grid-auto-flow: column;
        justify-self: center;
        overflow-x: scroll;
        white-space: nowrap;
        scroll-behavior: smooth;
      }
      counter-set: markeridx -1;
    }

    .box {
      height: 400px;
      width: 40%;
      border: 1px solid;
      display: inline-block;
      margin-left: 50px;
      margin-right: 50px;
      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-left: 100px;
      }
      &::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>
      // carousel.scrollLeft = carousel.scrollWidth;
      async function runTest() {
        // Wait for the (instant) scroll of the carousel itself.
        let scrollend_promise =
          waitForScrollEndFallbackToDelayWithoutScrollEvent(carousel);
        // Scroll to the max horizontal offset.
        carousel.scrollLeft = carousel.scrollWidth;
        await scrollend_promise;
        // Wait for the (smooth) scroll of the scroll-marker-group pseudo.
        scrollend_promise =
          waitForScrollEndFallbackToDelayWithoutScrollEvent(carousel);
        await scrollend_promise;
        takeScreenshot();
      }
      waitForCompositorReady().then(runTest);
    </script>
  </body>
</html>

/css/css-overflow/scroll-markers/scroll-marker-group-keeps-active-in-view-ref.html

<!DOCTYPE html>
<html>
  <body>
    <style>
    .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;
      direction: rtl;
      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;
      direction: rtl;
    }

    .box {
      height: 400px;
      width: 40%;
      border: 1px solid;
      display: inline-block;
      margin-left: 50px;
      margin-right: 50px;
      scroll-snap-align: center;
      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-left: 100px;
    }

    .green {
      background-color: green
    }

    </style>
    <div class="scroller" id="carousel">
      <div class="box" id="box15"><p>15</p></div>
      <div class="box" id="box14"><p>14</p></div>
      <div class="box" id="box13"><p>13</p></div>
      <div class="box" id="box12"><p>12</p></div>
      <div class="box" id="box11"><p>11</p></div>
      <div class="box" id="box10"><p>10</p></div>
      <div class="box" id="box9"><p>9</p></div>
      <div class="box" id="box7"><p>7</p></div>
      <div class="box" id="box8"><p>8</p></div>
      <div class="box" id="box6"><p>6</p></div>
      <div class="box" id="box5"><p>5</p></div>
      <div class="box" id="box4"><p>4</p></div>
      <div class="box" id="box3"><p>3</p></div>
      <div class="box" id="box2"><p>2</p></div>
      <div class="box" id="box1"><p>1</p></div>
      <div class="box" id="box0"><p>0</p></div>
    </div>
    <div class="scroll-marker-group" id="marker-group">
      <div class="scroll-marker green" id="marker15"><a href="#">15</a></div>
      <div class="scroll-marker" id="marker14"><a href="#">14</a></div>
      <div class="scroll-marker" id="marker13"><a href="#">13</a></div>
      <div class="scroll-marker" id="marker12"><a href="#">12</a></div>
      <div class="scroll-marker" id="marker11"><a href="#">11</a></div>
      <div class="scroll-marker" id="marker10"><a href="#">10</a></div>
      <div class="scroll-marker" id="marker9"><a href="#">9</a></div>
      <div class="scroll-marker" id="marker8"><a href="#">8</a></div>
      <div class="scroll-marker" id="marker7"><a href="#">7</a></div>
      <div class="scroll-marker" id="marker6"><a href="#">6</a></div>
      <div class="scroll-marker" id="marker5"><a href="#">5</a></div>
      <div class="scroll-marker" id="marker4"><a href="#">4</a></div>
      <div class="scroll-marker" id="marker3"><a href="#">3</a></div>
      <div class="scroll-marker" id="marker2"><a href="#">2</a></div>
      <div class="scroll-marker" id="marker1"><a href="#">1</a></div>
      <div class="scroll-marker" id="marker0"><a href="#">0</a></div>
    </div>
  </body>
</html>