Ask HN: What is the best product documentation you’ve ever seen?

https://elixir-lang.org/docs.html

Airship, formerly Urban Airship, i think.

a few years ago i was helped to build out a Sphinx-based search feature, integrate it into a Pyramid-based app, and something UA were doing made me want my app/docs to look/act like theirs

part of it was the search, part of it was the comprehensiveness, part of it was the magically-appearing in-page #anchor links when you'd mouseover an -type header element so that you could easily refer to a section of a page -- something which i feel like is obviously crucial to useable docs, but rarely exists in real life, and part aeshetics.

a quick glance just now seems they still have docs, tho i guess most established company doc sites would look good and generally be high-functioning these days. i suspect more of them were built from scratch back in the day, but not sure -- it's prob difficult for the docs vendors to keep up with integrating api tools, etc.