seirdy.one/content/notes/JS-enabled-engines.md

title	date	replyURI	replyTitle	replyType	replyAuthor	replyAuthorURI
JS-enabled engines	2022-06-02T18:30:30-07:00	https://mk.nixnet.social/notes/911asmc9rn	if search engine crawlers didn't run JavaScript the Web would be better	SocialMediaPosting	Alexandra	https://www.alm.website/me

The only engines I know of that run JavaScript are Google, Bing, and maybe Petal. None of the other engines in my list appear to support it. I don't even think Yandex does.

It's common practice for sites to give a JavaScript-lite version to search engines, though if the content differs heavily you run the risk of hitting a manual action. I'd imagine that search-crawler-exclusive editions would become the norm if crawlers stopped handling JavaScript.

Marginalia actually seems to penalize its use.

Update: Yep (formerly FairSearch) also seems to evaluate JavaScript