I originally posted this article as a series of tweets here.
Introducing hohoro
hohoro is an incremental build tool for JS/TS libraries, leveraging SWC and TSC under the hood!
Check out the project here: https://hohoro.vercel.app/.
Most build tools for libraries impose additional restrictions on the configuration that is exposed to you - often wrapping some core tools that you end up needing to use for other things (like configuring tests for example).
hohoro approaches things a bit differently...
It doesn't directly wrap those core tools, and instead lets you configure them as needed.
On top of that, it adds a light weight incremental build cache - like turborepo - but on a per-file basis instead of all or nothing for each workspace.
We started to adopt this pattern at Wayfair to help with incremental compile times for larger libraries and saw big wins for local development!