usignal
A minimal reactive signals library blending @preact/signals-core API with solid-js inspired features, at 816 bytes.
What is usignal?
µsignal is a minimal reactive signals library that blends the API of @preact/signals-core with features inspired by solid-js. It provides core reactivity primitives—signals, computed values, and effects—in an ultra-lightweight package (816 bytes minified with brotli). It solves the need for a small, fast, and flexible reactivity system that can integrate with various frameworks or standalone JavaScript projects.
Frontend developers and library authors who need a lightweight, framework-agnostic reactivity system, especially those familiar with or transitioning from Preact Signals or Solid.js.
Developers choose µsignal for its tiny footprint, performance-competitive implementation, and API flexibility—offering multiple patterns (default, functional, Solid-like) in one package. Its enhanced equality handling and lazy computed values provide robustness out of the box.
Overview
A blend of @preact/signals-core and solid-js basic reactivity API
Use Cases
Best For
- Adding lightweight reactivity to vanilla JavaScript projects
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