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[Accessibility] Nested ARIA and HTML buttons - Presentational Roles Conflict Resolution #50045

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[Accessibility] Nested ARIA and HTML buttons - Presentational Roles Conflict Resolution #50045

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Nested ARIA and HTML buttons - Presentational Roles Conflict Resolution
giacomo-petri Jan 13, 2025
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Update wai-aria/role/role_none_conflict_resolution.tentative.html
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46 changes: 46 additions & 0 deletions wai-aria/role/role_none_conflict_resolution.tentative.html
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<!doctype html>
<html>
<head>
<title>Role None Conflict Resolution Verification Tests</title>
<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="/wai-aria/scripts/aria-utils.js"></script>
</head>
<body>

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<!-- ARIA specs: https://www.w3.org/TR/wai-aria-1.3/#tree_exclusion -->
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<!-- no conflict, since not focusable; inner button should be exposed as generic - children presentational - //https://github.com/web-platform-tests/interop-accessibility/issues/161 -->
<h2>ARIA role="button" nesting ARIA role="button" (no presentational roles conflict resolution, since not focusable)</h2>
<div role="button">
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<span>outer button</span>
<span role="button" class="ex-generic" data-testname="non-focusable ARIA[role button] nesting non-focusable ARIA[role button]">Inner button</span>
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</div>

<!-- conflict arise, since inner button is focusable - //https://github.com/web-platform-tests/interop-accessibility/issues/161-->
<h2>HTML button nesting HTML button</h2>
<div id="button-container">
<button id="outer-button">
<span>outer button</span>
<span id="inner-button-container"></span>
</button>
</div>

<script>
//https://github.com/web-platform-tests/interop-accessibility/issues/161 starts
const innerButton = document.createElement("button");
innerButton.textContent = " (inner button)";
innerButton.id = "inner-button";
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innerButton.classList.add("ex");
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innerButton.setAttribute('data-expectedrole','button');
innerButton.setAttribute('data-testname','JS injected HTML button within another HTML button');
document.getElementById("inner-button-container").appendChild(innerButton);
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@cookiecrook cookiecrook Jan 17, 2025 •
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Unfortunately, this test may not return anything useful, since button > span > button is invalid (I think?) and not guaranteed to render anything as it's own inner button. If it doesn't get a RenderObject, there won't be a reliable way to check the role.

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I was curious to see the result because button > span > button isn’t allowed in HTML; in fact, as expected, browsers automatically move the nested button outside the parent button.
However, if you wrap the button using JavaScript, the nested buttons remain and "work as intended".

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Okay then... Since this is undefined behavior, the only remaining change needed is to remove the expectation that this should be a button... After further WG discussion, we may decide that's right, or it may end up being something else, so I don't want a tentative test (with a potentially invalid assumption) to be the cause of an rendering engine change that needs to be rolled back later.

innerButton.setAttribute('data-expectedrole','SPEC_AMBIGUOUS_LOG_VALUE');

I'm marking the PR as approved, pending this last change. Thanks for your diligence and patience!

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Done!


AriaUtils.verifyRolesBySelector(".ex");
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AriaUtils.verifyGenericRolesBySelector(".ex-generic");
</script>

</body>
</html>
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