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H67: Using null alt text and no title attribute on img elements for images that assistive technology should ignore | WAI | W3C
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Technique H67:Using null
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Examples of ways to meet WCAG; not required
About WCAG Techniques
Technique H67:Using null alt text and no title attribute on img elements for images that assistive technology should ignore
About this Technique
This technique relates to 1.1.1: Non-text Content (Sufficient).
This technique applies to HTML documents that load images.
Description
The purpose of this technique is to show how images can be marked so that they can be ignored by assistive technology.
If no title attribute is used, and the alt text is set to null (i.e., alt="") it indicates to assistive technology that the image can be safely ignored.
Note
Having a "null" alt attribute is not the same as having no alt attribute.
Examples
Example 1: Inserting a decorative image on a web page
<img alt="" src="squiggle.gif" height="20" width="20">Related Resources
No endorsement implied.
Tests
Procedure
For each image that should be ignored:
- Check that
titleattribute is either absent or empty. - Check that
altattribute is present and empty.
Expected Results
- #1 and #2 are true