grid-order-with-nested-grids.html

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This test has a WPT meta file that expects 3 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /shadow-dom/focus-navigation/reading-flow/tentative/grid-order-with-nested-grids.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<meta name="timeout" content="long">

<title>CSS Display: reading-flow with value grid-order in nested grids</title>

<link rel="help" href="https://drafts.csswg.org/css-display-4/#reading-flow">

<link rel="author" title="Di Zhang" href="mailto:dizhangg@chromium.org">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="/resources/testdriver.js"></script>

<script src="/resources/testdriver-vendor.js"></script>

<script src="/resources/testdriver-actions.js"></script>

<script src='../../resources/shadow-dom.js'></script>

<script src="../../resources/focus-utils.js"></script>

<style>

.box {

  display: grid;

  reading-flow: grid-order;

  border-radius: 5px;

  padding: 20px;

  border-style: dashed;

</style>

<div class="test-case" data-expect="w,d3,b3a,b3b,d2,b2,d1,b1a,b1b"

      data-description="Grid items are not grid containers.">

  <div class="box" id="w" tabindex="0">

    <div style="order: 2" id="d1" tabindex="0">Div 1

      <button id="b1a" style="order: 3">Button 1A</button>

      <button id="b1b">Button 1B</button>

    </div>

    <div id="d2" tabindex="0">Div 2

      <button id="b2">Button 2</button>

    </div>

    <div id="d3" style="order: -1" tabindex="0">Div 3

      <button id="b3a" style="order: 2">Button 3A</button>

      <button id="b3b">Button 3B</button>

    </div>

  </div>

</div>

<div class="test-case"

      data-expect="wrapper,div3,button3b,button3a,div2,button2,div1,button1b,button1a"

      data-description="Grid items are grid containers.">

  <div class="box" id="wrapper" tabindex="0">

    <div class="box" style="order: 2" id="div1" tabindex="0">Div 1

      <button id="button1a" style="order: 3">Button 1A</button>

      <button id="button1b">Button 1B</button>

    </div>

    <div class="box" id="div2" tabindex="0">Div 2

      <button id="button2">Button 2</button>

    </div>

    <div class="box" id="div3" style="order: -1" tabindex="0">Div 3

      <button id="button3a" style="order: 2">Button 3A</button>

      <button id="button3b">Button 3B</button>

    </div>

  </div>

</div>

<div class="test-case" data-expect="a,b,d,c"

      data-description="Only has grid containers.">

  <div class="box" id="a" tabindex="0">A

    <div class="box" id="b" tabindex="0">B

      <div class="box" id="c" tabindex="0" style="order: 2">C</div>

      <div class="box" id="d" tabindex="0">D</div>

    </div>

  </div>

</div>

<script>

runFocusTestCases();

</script>