Why add an ID to a post whose image is already described in alt text? Isn't that exactly what alt text is already for? I was under the impression that image descriptions were an awkward substitute that we only had to use because Tumblr didn't use to have alt text/because not everyone adds it.
Hi!! I copy out alt text because alt text isn't the best option for everyone who needs IDs-- the feature can be buggy or hard to use, there's an issue with text sizing which I haven't heard of being resolved (as of November of this year), not everyone uses screenreaders, etc. Plain text image descriptions are definitely important tools for everyone who doesn't prefer alt! It's mostly a matter of competing access needs; what I've seen as the most broadly accessible practice is to write a concise description in alt and then add detail as needed in a plain text ID.
Here's the post which I used as a resource about one of the current issues with alt!










