statelet/dist/index.js

Dead simple state management built on kvkit - composable, reactive, shareable. Supports Standard Schema (Valibot, Zod, ArkType).

/**
 * Create a reactive state container
 */
export function state(initial) {
    let current = initial;
    const listeners = new Set();
    return {
        get() {
            return current;
        },
        set(valueOrUpdater) {
            const next = typeof valueOrUpdater === 'function'
                ? valueOrUpdater(current)
                : valueOrUpdater;
            if (next !== current) {
                current = next;
                listeners.forEach(callback => callback(current));
            }
        },
        subscribe(callback) {
            listeners.add(callback);
            callback(current); // Call immediately with current value
            return () => {
                listeners.delete(callback);
            };
        }
    };
}
/**
 * Compose multiple enhancers into a single state
 *
 * @example
 * const myState = compose(
 *   state({ count: 0 }),
 *   withLocalStorage('count'),
 *   withEffect(console.log)
 * );
 */
export function compose(base, ...enhancers) {
    return enhancers.reduce((current, enhancer) => enhancer(current), base);
}
/**
 * Curried version of compose for functional style
 *
 * @example
 * const createCounter = enhance(
 *   withLocalStorage('count'),
 *   withEffect(console.log)
 * );
 *
 * const counter = createCounter(state({ count: 0 }));
 */
export function enhance(...enhancers) {
    return (base) => compose(base, ...enhancers);
}
// Export all enhancers from the enhancers module
export * from './enhancers';