batch

Group multiple signal updates to prevent redundant effects.

/**
 * Group multiple signal updates into a single effect flush.
 * @param callback Function containing batched signal updates.
 * @returns The result of the callback.
 */
batch<T>(callback: () => T): T

Usage

Batch groups multiple signal updates together so that effects only run once after all updates. Use this to avoid unnecessary recomputation when updating several signals at once.

import { signal, batch } from '@hellajs/core';

// Create signals for form state
const username = signal('');
const email = signal('');
const isSubmitting = signal(false);
const isSuccess = signal(false);

function submitForm() {
  batch(() => {
    isSubmitting.set(true);

    // Simulate async form submission
    setTimeout(() => {
      batch(() => {
        isSubmitting.set(false);
        isSuccess.set(true);
        username.set('');
        email.set('');
      });
    }, 1000);
  });
}