Rocket Validator integrates the W3C Validator HTML checker into an automated web crawler.
HTML issues tagged as alt.
<img> tags, used to include images on a document, require an alt attribute to describe the contents of the image. This is essential for users that cannot see the image (like screen reader users), or as an alternate text when the image cannot be displayed. Example:
<img src="photo.jpg" alt="Person holding a cat" />
When an img element has an empty alt attribute, its role is implicitly decorative, so it must not specify a role attribute.
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