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<!DOCTYPE html>
<title>Position value 'sticky' should be a valid value</title>
<link rel="help" href="https://www.w3.org/TR/css-position-3/#position-property" />
<meta name="assert" content="This test checks that setting position to 'sticky'
should be allowed." />
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<!-- We need something to create elements in. -->
<body></body>
<script>
// Sticky is valid for all elements except table-column-group and table-column.
const VALID_STICKY_DISPLAY_TYPES = [
'block',
'inline',
'run-in',
'flow',
'flow-root',
'table',
'flex',
'grid',
'ruby',
'subgrid',
'list-item',
'table-row-group',
'table-header-group',
'table-footer-group',
'table-row',
'table-cell',
'table-caption',
'ruby-base',
'ruby-text',
'ruby-base-container',
'ruby-text-container',
'contents',
'none',
];
const INVALID_STICKY_DISPLAY_TYPES = [
'table-column-group',
'table-column',
];
test(() => {
for (displayValue of VALID_STICKY_DISPLAY_TYPES) {
let div = document.createElement('div');
let style = `position: sticky; display: ${displayValue};`;
div.setAttribute('style', style);
document.body.appendChild(div);
// We only check display values that the browser under test recognizes.
if (div.style.display == displayValue) {
assert_equals(getComputedStyle(div).position, 'sticky',
`Expected sticky to be valid for display: ${displayValue}`);
}
document.body.removeChild(div);
}
for (displayValue of INVALID_STICKY_DISPLAY_TYPES) {
let div = document.createElement('div');
let style = `position: sticky; display: ${displayValue};`;
div.setAttribute('style', style);
document.body.appendChild(div);
assert_not_equals(getComputedStyle(div).position, 'sticky',
`Expected sticky to be invalid for display: ${displayValue}`);
document.body.removeChild(div);
}
}, 'The value of sticky for the position property should be parsed correctly');
</script>
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