caniuse is an extremely popular website among people that had to touch web technologies, so much that almost anyone searching for issues on web apis seriously will have hard time not stumble upon it very quickly.

Hence, it's a totally valid assomption that the HN crowd might be aware of it. I'm sorry you were not, but you really are an outlier on this, which is really not a bad thing, btw.

Thanks for the reply, but I've read HN almost daily for years and have been a professional developer for way longer than that. I also just finished an API-definition project that involved a ton of research on API design and code-generation tooling (with OpenAPI in particular).

I have never heard of "caniuse." Swagger? Postman? Mocking tools and services? Lots of their ilk? Sure. In fact just recently I saw this API article posted here: https://news.ycombinator.com/item?id=40161794

If you had typed half your comment into a search machine instead of the HN comment box, you would've gotten an answer.

But then I would have had to search as well.

As a rule of thumb (well, wishful thinking, I realize), if Wikipedia doesn't know it, spend a few words to introduce a term.

That's always the excuse for piss-poor post titles.

https://caniuse.com/ is a popular tool to check what web features are working across different browsers - "can you use this and assume that it will work for others".

Yes. It is used to let us know which HTML elements/features/etc are supported by different browsers/versions

It doesn't say that. It merely says this thing is like another undescribed thing.

At first I thought it was some kind of service for dog owners, until I noticed the missing N. So... that left no explanation.

An undescribed but very famous thing among the readers of HN.

caniuse.com is a website, where developers can check which features are supported by which browser and their versions. It is a immensely useful resource for webdevs.