New rule: H45 - img-longdesc

H45 - img-longdesc

This test checks that if img elements has a valid longdesc attribute.

Checks that if elements has a longdesc attribute, that it has content. This also checks that the longdesc value is a valid URI.

Tags: wcag2a, wcag311, cat.language

Selector

Select each node that has a longdesc attribute.

Checks

language/img-focusable ( all )

1. Check that the image is keyboard focusable.

language/img-longdesc-valid ( all )

1. Check that the value of the longdesc attribute is a valid URI of an existing resource: Check if the text is more than 2000 chars long. If yes, mark it cantTell and stop, else 2.
2. Check if the longdesc start with # and search for the pointed element within the page. If found pass, else fail.

[devarshipant]

Upon detection of longdesc attribute on an image, a check to ensure that the image is keyboard focusable would help, as longdesc on static images can be difficult to parse using only the keyboard.

[WilcoFiers]

Seeing as there has been no activity on this for nearly a year, and I don’t think there’s any interest from the axe-core team to develop this rule ourselves, I’m going to close this issue.