pagefind

https://pagefind.app/
https://github.com/CloudCannon/pagefind/

Pagefind is a fully static search library that aims to perform well on large sites, while using as little of your users’ bandwidth as possible, and without hosting any infrastructure.

...The goal of Pagefind is that websites with tens of thousands of pages should be searchable by someone in their browser, while consuming a reasonable amount of bandwidth. Pagefind’s search index is split into chunks, so that searching in the browser only ever needs to load a small subset of the search index. Pagefind can run a full-text search on a 10,000 page site with a total network payload under 300KB, including the Pagefind library itself. For most sites, this will be closer to 100KB.

The search engine appears to be a rust application built to a wasm bundle. It looks like it builds an index of the site, creates a bunch of page files, and then when you search it checks the index for what the relevant pages are, downloads only those ones, and serves results.

via Carl M. Johnson on mastodon

see also FlexSearch