Angular 19.0+ introduces three new ways to load data efficiently using signals: 1. resource (Promise-based Loader) The resource API provides a straightforward approach for fetching and updating data asynchronously using Promises . It is ideal for scenarios where you need a simple data-loading mechanism without reactive programming. Since it is promise-based, it follows a request-response pattern, making it suitable for one-time data fetches. Example usage: import { resource } from '@angular/core' ; const userResource = resource ( async () => { const response = await fetch ( 'https://api.example.com/user' ); return response. json (); }); Here, userResource() triggers the function, fetches data from the API, and resolves it using a promise. 2. rxResource (Observable-based Loader) The rxResource API is designed for Observable-based data fetching, making it ideal for reactive applications where data needs to be streamed or continuously updated....
Angular 19 New Feature – linkedSignal, LinkedSignal API In Angular 19, linkedSignal allows you to manage and synchronize dependent states efficiently. This feature is especially useful when you have multiple states that rely on each other or need to stay in sync. Here’s a step-by-step guide with an example of dependent state with linkedSignal in Angular: Scenario Example: You have two signals: selectedCountry - A signal for the selected country. statesForCountry - A signal that depends on the selected country and updates automatically. 1. Import Required Utilities First, ensure you import Angular's reactivity utilities: import { signal, computed, linkedSignal } from '@angular/core'; 2. Define Signals and Dependent State Use signal for the independent state and linkedSignal to define the dependent state. Example (location-state.service.ts): import { Injectable, signal, linkedSignal } from '...