flex.html - mozsearch

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This WPT test may be referenced by the following Test IDs:
- /html/rendering/widgets/button-layout/flex.html - WPT Dashboard Interop Dashboard

<!doctype html>

<title>button with flex/inline-flex</title>

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

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

<style>

#inline-flex { display: inline-flex }

#flex { display: flex }

#ref > div { display: flex }

#flexstart {

  border: none;

  padding: 0;

  display: flex;

  align-items: flex-start;

  height: 3em;

#stretch {

  border: none;

  padding: 0;

  display: flex;

  align-items: stretch;

  height: 3em;

</style>

<button id=inline-flex><div>1</div><div>2</div><div>3</div><div>4</div></button>

<button id=flex><div>1</div><div>2</div><div>3</div><div>4</div></button>

<button id=ref><div><div>1</div><div>2</div><div>3</div><div>4</div></div></button>

<div><button id="flexstart"><span id="flexstart-item">abc</span></button></div>

<div><button id="stretch"><span id="stretch-item">abc</span></button></div>

<script>

const ref = document.getElementById('ref');

const expectedWidth = ref.clientWidth;

const expectedHeight = ref.clientHeight;

for (const elm of [document.getElementById('inline-flex'),

                   document.getElementById('flex')]) {

  test(() => {

    // check that flex is supported

    const flexValue = elm.id;

    assert_equals(getComputedStyle(elm).display, flexValue, `${flexValue} is not supported`);

    const width = elm.clientWidth;

    const height = elm.clientHeight;

    assert_equals(width, expectedWidth, 'clientWidth');

    assert_equals(height, expectedHeight, 'clientHeight');

  }, elm.id);

// crbug.com/700029

test(() => {

  assert_equals(document.getElementById('flexstart').offsetTop,

    document.getElementById('flexstart-item').offsetTop);

}, 'align-items:flex-start should work');

// crbug.com/1004163

test(() => {

  assert_equals(document.getElementById('stretch').offsetHeight,

    document.getElementById('stretch-item').offsetHeight);

}, 'align-items:stretch should work');

</script>