More recently...there is an on going discussion over whether or not to introduce Twitter's ALT button overlay to Mastodon.
One of the commenters linked to their own evaluation of the ALT feature on Twitter:
A good read.
Anyway, taking inspiration from those discussions I've injected some CSS (https://gist.github.com/FiXato/3de505b04efefd49a1e3568b70545234) to a11y.social that surrounds images with a dotted red border if they DO NOT have alt text.
As a sighted user, I found Twitter's ALT button useful for deciding whether or not to offer up a description in a reply.
Here is a quick test. If you are browsing Mastodon from the a11y.social instance you should see a red border around the image attached to this post. If you are on a different instance, tell your admin to add the CSS linked in my previous toot!
Alt text (intentionally excluded from image): a German Shepherd asleep on a couch with a tennis ball in its mouth.
One more test, same picture.
Interesting. So because I edited the first post, an empty alt attribute was added to the image which breaks the highlighting rule in CSS.
@mark Thanks for adding the Alt text feature. Really helpful.
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