field-sizing-select.html

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This test has a WPT meta file that expects 5 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /html/rendering/widgets/field-sizing-select.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<link rel="help" href="https://drafts.csswg.org/css-ui-4/#field-sizing">

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

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

<body>

<style>

.disable-default {

  field-sizing: content;

</style>

<div id="container"></div>

<script>

const container = document.querySelector('#container');

const DISABLE = 'class="disable-default"';

// Tests for drop-down box ====================================================

test(() => {

  const s = '<select>><option>1<option>quick brown<option>fox</select>';

  container.innerHTML = s + s;

  container.lastElementChild.style.fieldSizing = 'content';

  const widthForContent1 = container.lastElementChild.offsetWidth;

  assert_greater_than(container.firstElementChild.offsetWidth,

                      widthForContent1);

  container.lastElementChild.selectedIndex = 1;

  const widthForContentQuickBrown = container.lastElementChild.offsetWidth;

  assert_greater_than(widthForContentQuickBrown, widthForContent1);

}, 'dropdown: The width should depend on the selected OPTION');

test(() => {

  container.innerHTML = '<select><option>foo<option>quick brown fox</select>';

  const select = container.firstElementChild;

  const initialWidth = select.offsetWidth;

  select.style.fieldSizing = 'content';

  assert_less_than(select.offsetWidth, initialWidth);

  select.style.fieldSizing = 'fixed';

  assert_equals(select.offsetWidth, initialWidth);

}, 'dropdown: Change the field-sizing value dynamically');

// Tests for list box =========================================================

// Some paltforms don't support list box rendering.

container.innerHTML = '<select></select><select multiple></select>';

if (container.firstElementChild.offsetHeight != container.lastElementChild.offsetHeight) {

  test(() => {

    container.innerHTML = `<select multiple><option>fox</select>` +

                          `<select multiple ${DISABLE}><option>fox</select>`;

    const former = container.firstElementChild;

    const latter = container.lastElementChild;

    const widthForOneItem = latter.offsetWidth;

    const heightForOneItem = latter.offsetHeight;

    assert_equals(former.offsetWidth, widthForOneItem);

    assert_greater_than(former.offsetHeight, heightForOneItem);

    latter.add(new Option('quick brown'));

    assert_greater_than(latter.offsetWidth, widthForOneItem);

    assert_greater_than(latter.offsetHeight, heightForOneItem);

  }, 'listbox: The size depend on the content');

  test(() => {

    container.innerHTML = `<select size="4"></select><select size="4" ${DISABLE}></select>`;

    const former = container.firstElementChild;

    const latter = container.lastElementChild;

    const widthForZeroItem = latter.offsetWidth;

    const heightForZeroItem = latter.offsetHeight;

    assert_equals(former.offsetWidth, widthForZeroItem);

    assert_greater_than(former.offsetHeight, heightForZeroItem);

    latter.add(new Option('quick brown'));

    assert_greater_than(latter.offsetWidth, widthForZeroItem);

    assert_greater_than(latter.offsetHeight, heightForZeroItem);

  }, 'listbox: The size attribute value is ignored');

  test(() => {

    container.innerHTML = '<select multiple><option>foo<option>quick brown fox</select>';

    const select = container.firstElementChild;

    const initialHeight = select.offsetHeight;

    select.style.fieldSizing = 'content';

    assert_less_than(select.offsetHeight, initialHeight);

    select.style.fieldSizing = 'fixed';

    assert_equals(select.offsetHeight, initialHeight);

  }, 'listbox: Change the field-sizing value dynamically');

</script>

</body>