accessibility-checker-engine
Version:
An automated accessibility checking engine for use by other tools
98 lines (85 loc) • 4.67 kB
HTML
<html lang="en-US">
<head>
<title>style_focus_visible - Accessibility Checker Help</title>
<script>
RULE_MESSAGES = {"en-US":{"group":"The keyboard focus indicator should be visible when default border or outline is modified by CSS","potential_focus_not_visible":"Check the keyboard focus indicator is visible when using CSS declaration for 'border' or 'outline'","pass_focus_visible":"The keyboard focus indicator is visible or is not changed from the browser default"}};
RULE_ID = "style_focus_visible"
</script>
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<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">
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<h3 id="ruleMessage"></h3>
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<div id="locLevel"></div>
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<p id="groupLabel"></p>
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<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?
All focus indicators should be visible and distinguishable.
When navigating a Web page with a keyboard, users need to know which element has the keyboard focus.
A visual focus indicator might be a vertical bar (a typical cursor) or a visible border surrounding a user interface control.
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<div id="locSnippet"></div>
### What to do
* If the keyboard focus meets visibility standards when tabbing on to the component, no action is needed
* **Or**, use the default focus indicator for the platform
* **Or**, adjust the CSS styling to make the keyboard focus highly visible
* **Or**, use interface components that are highlighted by the user agent when they receive focus
* **Or**, use scripting to change the background color or border of the element to make it visually distinct when it receives focus
</script></mark-down>
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<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 2.4.7 Focus Visible](https://www.ibm.com/able/requirements/requirements/#2_4_7)
* [Develop - Focus indicator is highly visible](https://www.ibm.com/able/toolkit/develop/keyboard/#focus-indicator)
* [C15: CSS to change the focus presentation](https://www.w3.org/WAI/WCAG22/Techniques/css/C15)
* [SCR31: Scripting background color or border for focus](https://www.w3.org/WAI/WCAG22/Techniques/client-side-script/SCR31)
* [Failure F78: Styling element that removes the visual focus](https://www.w3.org/WAI/WCAG22/Techniques/failures/F78)
### Who does this affect?
* People using a screen reader, including blind, low vision, and neurodivergent people
* People who physically cannot use a pointing device
</script></mark-down>
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</body>
</html>