State Management for Vue 3
"Harlem is a simple, unopinionated, lightweight and extensible state management for Vue 3.
It has a simple functional API for creating, reading and mutating state. At it's heart, Harlem just uses Vue reactive objects and computeds which means if you know how to use Vue, you'll know how to use Harlem. It also doesn't impose any standards or conventions on your codebase.
Harlem weighs in at around 1.5KB (minified & gzipped) and has zero dependencies apart from Vue. It uses a plugin architecture so you can extend it any way you want."