@stateloom/core

The reactive kernel for StateLoom. Provides the primitive building blocks that every other @stateloom/* package builds on.

Install

pnpm add @stateloom/core

Quick Start

import { signal, computed, effect, batch } from '@stateloom/core';

const count = signal(0);
const doubled = computed(() => count.get() * 2);

const dispose = effect(() => {
  console.log(`count=${count.get()}, doubled=${doubled.get()}`);
  return undefined;
});
// "count=0, doubled=0"

batch(() => {
  count.set(5);
  count.update((n) => n + 1);
});
// "count=6, doubled=12" — fires once

dispose();

Exports

| Export | Description | | ----------------------- | ---------------------------------------------- | | signal(value) | Mutable reactive value container | | computed(fn) | Lazy, memoized derived value | | effect(fn) | Auto-tracking side effect with cleanup | | batch(fn) | Coalesce multiple writes into one notification | | createScope() | SSR isolation scope | | runInScope(scope, fn) | Execute code within a scope | | serializeScope(scope) | Serialize scope state for hydration |

Types

Subscribable<T>, Signal<T>, ReadonlySignal<T>, SignalOptions<T>, Scope

Size

~1.5 KB gzipped

Documentation

• API Reference
• Core Design (LLD)