accessibility-checker-engine
Version:
An automated accessibility checking engine for use by other tools
95 lines (82 loc) • 4.62 kB
HTML
<html lang="en-US">
<head>
<title>img_alt_redundant - Accessibility Checker Help</title>
<script>
RULE_MESSAGES = {"en-US":{"Pass_0":"Rule Passed","Fail_1":"Link text is repeated in an image 'alt' value within the same link","Fail_2":"Link text of previous link is repeated in image 'alt' value of a link","Fail_3":"Image 'alt' value within a link is repeated in link text of the link after","group":"The text alternative for an image within a link should not repeat the link text or adjacent link text"}};
RULE_ID = "img_alt_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>
<!-- 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?
When the text equivalent of an image inside or adjacent to a link is the same as the link text, people who use a screen reader will hear the same text announced twice.
Also, those who use text-only browsers will see both the link text and text equivalent of the image and can be confused by the redundant text.
<!-- This is where the code snippet is injected -->
<div id="locSnippet"></div>
### What to do
* If a link has text and a redundant image, set the image `alt` attribute to `alt=“”` (null alt without any spaces)
* **Or**, if a link has text and an image that adds important information to the text, set the image `alt` attribute to convey the added information
(e.g., `<a><img alt="urgent">new mail</a>`)
* **Or**, if adjacent links have different targets but the same text, change the link text or the `alt` attribute on the image to distinguish the purpose of each link
* **Or**, if adjacent links have the same target, combine them into a single link and set the image `alt` attribute to `alt=“”`
</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">
<!-- Start side panel -->
<mark-down><script type="text/plain">
### About this requirement
* [IBM 1.1.1 Non-text content](https://www.ibm.com/able/requirements/requirements/#1_1_1)
* [IBM 2.4.4 Link Purpose (in Context)](https://www.ibm.com/able/requirements/requirements/#2_4_4)
* [H2: Combining adjacent image and text links](https://www.w3.org/WAI/WCAG22/Techniques/html/H2)
### Who does this affect?
* People using a screen reader, including blind, low vision, and neurodivergent people
* People using text-based browsers (e.g., Lynx) or audio interfaces
</script></mark-down>
<!-- End side panel -->
</div>
</div>
</div>
</body>
</html>