Siggie

A small reactive runtime for JavaScript.

npm install siggie

import { computed, effect, signal } from "siggie";

const price = signal(10);
const quantity = signal(2);
const total = computed(() => price.value * quantity.value);

effect(() => {
  console.log(total.value);
}, true);

price.value = 12;
quantity.value = 3;

• signal(value) creates a writable signal.
• computed(fn) creates a lazy computed signal.
• effect(fn, sync?, scope?) creates an effect and returns its disposer.
• batch(fn) groups writes and coalesces synchronous effects.
• flushSync() drains queued effects.
• Read .peek without creating a dependency.
• Assign .eq to customize equality.

npm test
npm run bench

Benchmark results are in benchmarks/README.md.