accessibility-checker-engine
Version:
An automated accessibility checking engine for use by other tools
112 lines (96 loc) • 4.87 kB
HTML
<html lang="en-US">
<head>
<title>aria_main_label_unique - Accessibility Checker Help</title>
<script>
RULE_MESSAGES = {"en-US":{"Pass_0":"Rule Passed","Fail_1":"Multiple elements with \"main\" role do not have unique labels","group":"Elements with \"main\" role must have unique labels"}};
RULE_ID = "aria_main_label_unique"
</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>
<!-- Rule specific message injected here -->
<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">
<!-- Start main panel -->
<mark-down><script type="text/plain">
### Why is this important?
The `<main>` element has an implicit landmark role of `"main"` that represents the central topic of the document.
This provides a non-obtrusive alternative for a “skip to main content” link.
It is possible, but not desirable, to have more than one element with a `"main"` role. For example, through DOM nesting (e.g., a document within a document) or by use of the `aria-owns` attribute.
In this situation, an associated unique label that describes each area of main content is needed to allow users of assistive technologies to understand the purpose of each main area, and navigate to them.
Ideally the author **should** mark no more than one element with the `"main"` role.
<!-- This is where the code snippet is injected -->
<div id="locSnippet"></div>
### What to do
* Remove the `"main"` role from all but the one element that represents the main content on the page (highly recommended)
* **Or**, for each element with a `"main"` role, either set the value of the `aria-labelledby` attribute to the `id` value of any visible text that appropriately and uniquely describes the element's central content
* **Or**, for elements where the design cannot accommodate suitable visible text, use the `aria-label` attribute to add an invisible, unique, non-empty label to the element
For example:
```
<html>
<body>
<main hidden aria-labelledby="title1">
<h1 id="title1"> Stock Ticker portlet </h1>
</main>
<div role="main" aria-label="Weather portlet">
...
</div>
</body>
</html>
```
</script></mark-down>
<!-- End main panel -->
<!-- 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 2.4.1 Bypass Blocks](https://www.ibm.com/able/requirements/requirements/#2_4_1)
* [ARIA specification - Main](https://www.w3.org/TR/wai-aria-1.2/#main)
* [ARIA practices - Landmark Regions](https://www.w3.org/WAI/ARIA/apg/practices/landmark-regions/)
### Who does this affect?
* People using a screen reader, including blind, low vision, and neurodivergent people
* People with dexterity impairments using voice control
</script></mark-down>
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</div>
</div>
</div>
</body>
</html>