css/css-ui/user-select-inheritance.html

<!DOCTYPE html>
<title>Tests inheritance of CSS user-select property</title>
<link rel="author" title="Google LLC" href="https://www.google.com/">
<link rel="help" href="https://drafts.csswg.org/css-ui/#content-selection">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="container">abc<div id="target">xyz</div>def</div>
<script>
const container = document.getElementById('container');
const target = document.getElementById('target');
function test_inheritance(value) {
    const property = `user-select:${value}`;
    test(() => {
        container.setAttribute('style', property);
        assert_equals(getComputedStyle(container).userSelect, value,
                      `${property} should be supported.`);
        assert_equals(getComputedStyle(target).userSelect, 'auto',
                      `${property} should not be inherited.`);
    }, `${property} should not be inherited.`);
}
test_inheritance('all');
test_inheritance('auto');
test_inheritance('contain');
test_inheritance('none');
test_inheritance('text');
</script>