Most UI frameworks lock their reactivity engines behind heavy compilers or component lifecycles. If you wanted fine-grained signals in a vanilla JS class or a Node.js worker, you had to either pull in a massive UI library or settle for sub-par, glitchy event emitters. Ripple.js extracts the exact same primitives that power modern interfaces (Signals, Computed values, and Effects) into a standalone, ~3.5KB package. Think of how Zod solved schema validation. Before Zod, validation was scattered across Express middleware and Mongoose schemas. Zod made validation a standalone utility. Ripple.js does the same for reactivity. It provides the exact same signals, computed values, and effects that power modern UI engines, extracted into a universal toolkit. Fine-grained reactivity — Signals, computed values, and side-effects. Framework-agnostic — Works seamlessly in Browsers, Node.js, Deno, Bun, and Web Workers. Tiny & Dependency-free — ~3.5KB minified + gzipped with zero transitive bloat. Batteries included — Stores, undo/redo history, persistence, and collections built-in. Framework adapters — First-class React, Vue 3, and Svelte hooks when you need them

RippleJS

Reactivity, Unbound

Reactivity, Unbound