Current state of client-side search in published content

Hi,

I'm wanting to create a Handbook similar to the GitLab Handbook (https://about.gitlab.com/handbook/).

The main issue, I think, is how to deal with search. The site will be password-protected, so it needs a client side search solution.

There is an old thread about client side search (http://discuss.asciidoctor.org/Asciidoc-to-Html-with-client-side-search-td4354i20.html), but I wondered if there is any more up to date solution?

Eirik