---
title: "JS-enabled engines"
date: 2022-06-02T18:30:30-07:00
replyURI: "http://archive.today/2022.09.10-195228/https://mk.nixnet.social/notes/911asmc9rn"
replyTitle: "if search engine crawlers didn't run JavaScript the Web would be better"
replyType: "SocialMediaPosting"
replyAuthor: "Alexandra"
replyAuthorURI: "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.

<p><ins>Update: Yep (formerly FairSearch) also seems to evaluate JavaScript</ins></p>