angular

Angular

Angular is an enterprise application framework featuring fine-grained reactivity via Signals, Standalone Components, built-in routing, and form validation.

When to Use

• Enterprise-Scale Single Page Applications (SPAs): Large multidisciplinary teams needing strict conventions, DI, and end-to-end tooling.
• Modern Reactive Frontend Architecture: Utilizing modern Angular Signals, computed values, and Zoneless change detection.
• Progressive Web Apps & Hybrid Mobile: Building performant, accessible mobile-ready web apps with Angular Material.
• Complex Form & Validation Workflows: Utilizing typed Reactive Forms with deep nested controls and custom async validators.

Quick Start

import { Component, signal, computed } from "@angular/core";

@Component({
  selector: "app-counter",
  standalone: true,
  template: `
    <p>Count: {{ count() }}</p>
    <p>Double: {{ double() }}</p>
    <button (click)="increment()">Increment</button>
  `,
})
export class CounterComponent {
  count = signal(0);
  double = computed(() => this.count() * 2);

  increment() {
    this.count.update((c) => c + 1);
  }
}

Core Concepts

Angular Signals & Fine-Grained Reactivity

State management using reactive primitives without Zone.js change detection overhead:

import { Component, signal, computed, effect } from "@angular/core";

@Component({
  selector: "app-cart-summary",
  standalone: true,
  template: `
    <div class="cart-box">
      <h3>Items in Cart: {{ itemCount() }}</h3>
      <p>Subtotal: {{ total() | currency }}</p>
      <button (click)="addItem('Item', 29.99)">Add Product</button>
    </div>
  `,
})
export class CartSummaryComponent {
  items = signal<{ name: string; price: number }[]>([
    { name: "Initial License", price: 99.0 },
  ]);

  itemCount = computed(() => this.items().length);
  total = computed(() =>
    this.items().reduce((sum, item) => sum + item.price, 0),
  );

  constructor() {
    effect(() => {
      console.log(`Cart total changed: $${this.total()}`);
    });
  }

  addItem(name: string, price: number): void {
    this.items.update((list) => [...list, { name, price }]);
  }
}