accessibility-checker-engine
Version:
An automated accessibility checking engine for use by other tools
99 lines (84 loc) • 4.65 kB
HTML
<html lang="en-US">
<head>
<title>aria_attribute_redundant - Accessibility Checker Help</title>
<script>
RULE_MESSAGES = {"en-US":{"pass":"The ARIA attribute is not redundant with a corresponding HTML attribute","fail_redundant":"The ARIA attribute \"{0}\" is redundant with the HTML attribute \"{1}\"","group":"An ARIA attribute should not be redundant with a corresponding HTML attribute"}};
RULE_ID = "aria_attribute_redundant"
</script>
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<!-- Title and messages generated at build time -->
<link rel="icon" href="https://ibm.com/able/favicon-32x32.png" type="image/png">
<link rel="icon" href="https://ibm.com/able/favicon.svg" type="image/svg+xml">
<link rel="stylesheet" href="../common/help.css" />
<script type="module">
import "https://1.www.s81c.com/common/carbon/web-components/version/v1.35.0/code-snippet.min.js";
import "https://1.www.s81c.com/common/carbon/web-components/version/v1.35.0/list.min.js";
</script>
<script src="https://cdn.jsdelivr.net/npm/marked/marked.min.js"></script>
<script src="../common/help.js"></script>
</head>
<body>
<div class="bx--grid toolHelp">
<div class="bx--row">
<div class="bx--col-sm-4 bx--col-md-8 bx--col-lg-16 toolHead">
<!-- Group message injected here -->
<h3 id="ruleMessage"></h3>
<!-- Severity level injected here -->
<div id="locLevel"></div>
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<p id="groupLabel"></p>
</div>
</div>
<div class="bx--row">
<div class="bx--col-sm-4 bx--col-md-5 bx--col-lg-8 toolMain">
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<mark-down><script type="text/plain">
### Why is this important?
Avoid unintended and confusing assistive technology behavior.
HTML and ARIA _attributes_ are exposed to users of assistive technologies.
ARIA _attributes_ are only intended to be used to enhance HTML native semantics (e.g., indicating that the element is required with `aria-required` attribute).
Using **both** an HTML attribute and the associated ARIA attribute with the same semantic meaning is redundant and has a potential for unintended conflicts if later changed.
Conflicting _attributes or values_ cause the ARIA attribute or value to be ignored.
<!-- This is where the code snippet is injected -->
<div id="locSnippet"></div>
### What to do
* Remove the unnecessary ARIA attribute that is redundant with HTML attribute.
* Review the [Requirements for use of ARIA attributes in place of equivalent HTML attributes](https://www.w3.org/TR/html-aria/#docconformance-attr) table to help determine when an ARIA attribute should be correctly used.
</script></mark-down>
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<!-- This is where the rule id is injected -->
<div id="ruleInfo"></div>
</div>
<div class="bx--col-sm-4 bx--col-md-3 bx--col-lg-4 toolSide">
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<mark-down><script type="text/plain">
### About this requirement
* [IBM 4.1.2 Name, Role, Value](https://www.ibm.com/able/requirements/requirements/#4_1_2)
* [ARIA 1.2 specification - Conflicts with Host Language Semantics](https://www.w3.org/TR/wai-aria-1.2/#host_general_conflict)
* [ARIA in HTML - Requirements for ARIA attributes in place of equivalent HTML attributes](https://www.w3.org/TR/html-aria/#docconformance-attr)
### Who does this affect?
* People using a screen reader, including blind, low vision, and neurodivergent people
* People using text only browser with Braille display
* People with dexterity impairments using voice control
* People using other assistive technologies that expose accessibility information
</script></mark-down>
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</div>
</div>
</div>
</body>
</html>