Blitz - WPT: contain-layout-suppress-baseline-001.html

wpt / css / css-contain / contain-layout-suppress-baseline-001.html

/css/css-contain/contain-layout-suppress-baseline-001.html

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>CSS Test: 'contain: layout' should make elements behave as if they have no baseline</title>
  <link rel="author" title="Daniel Holbert" href="mailto:dholbert@mozilla.com">
  <link rel="help" href="https://drafts.csswg.org/css-contain/#containment-layout">
  <link rel="help" href="https://drafts.csswg.org/css-flexbox-1/#valdef-align-items-baseline">
  <link rel="match" href="contain-layout-suppress-baseline-001-ref.html">
  <style>
  .flexBaselineCheck {
    display: flex;
    border: 1px solid black;
    height: 100px;
  }
  .flexBaselineCheck > * {
    contain: layout;
    border: 2px solid teal;
    align-self: baseline;
  }
  canvas {
    background: purple;
    width: 20px;
    height: 80px;
    box-sizing: border-box;
  }
  .flex {
    display: flex;
  }
  .grid {
    display: grid;
  }
  .multicol {
    column-count: 2;
  }
  </style>
</head>
<body>
  <div class="flexBaselineCheck">
    <!-- This canvas just exists to establish a precise, far-down baseline
         alignment position: -->
    <canvas></canvas>
    <!-- "contain:layout" should force all the elements below to behave as if
         they have no baseline. That means they all should *synthesize* a
         baseline from their border-box edge, in order to participate in flex
         item baseline alignment (to honor the outer flex container's
         "align-items:baseline"). So, the expectation here is that all of these
         elements' border-bottom edges should be aligned. -->
    <div>block</div>
    <fieldset><legend>leg</legend>fieldset</fieldset>
    <div class="flex">flex</div>
    <div class="grid">grid</div>
    <div class="multicol">multi<br>col</div>
    <details open><summary>summary</summary>details</details>
  </div>
</body>
</html>

/css/css-contain/contain-layout-suppress-baseline-001-ref.html

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>CSS Reftest Reference</title>
  <link rel="author" title="Daniel Holbert" href="mailto:dholbert@mozilla.com">
  <style>
  .flexBaselineCheck {
    display: flex;
    border: 1px solid black;
    height: 100px;
  }
  .flexBaselineCheck > * {
    border: 2px solid teal;

    /* In the testcase, the (baseline-aligned) items should all have their
       bottom borders aligned with the 80px-tall canvas.  In other words, their
       bottom borders should all be 20px away from the bottom of their flex
       container.  Here in the reference case, we just use "flex-end" alignment
       plus a hardcoded 20px margin-bottom to produce a precise reference
       for what that should look like. */
    align-self: flex-end;
    margin-bottom: 20px;
  }
  canvas {
    background: purple;
    width: 20px;
    height: 80px;
    box-sizing: border-box;
  }
  .flex {
    display: flex;
  }
  .grid {
    display: grid;
  }
  .multicol {
    column-count: 2;
  }
  </style>
</head>
<body>
  <div class="flexBaselineCheck">
    <canvas></canvas>
    <div>block</div>
    <fieldset><legend>leg</legend>fieldset</fieldset>
    <div class="flex">flex</div>
    <div class="grid">grid</div>
    <div class="multicol">multi<br>col</div>
    <details open><summary>summary</summary>details</details>
  </div>
</body>
</html>