Angular Tutorial: Setup, Core Concepts, and First Steps

Angular is Google's powerful framework designed for building modern, fast, and scalable Single Page Applications (SPAs). Modern Angular releases feature Standalone Components and reactive Signals, making frontend development exceptionally clean and performant. In this guide, we will cover tooling setup, foundational concepts, and a straightforward working example.

Core Building Blocks of Angular

Angular applications are built around three primary architecture pillars that separate presentation, business logic, and state management.

Installation and Project Initialization

To get started, you need Node.js installed along with access to a terminal or PowerShell environment.

1. Install Angular CLI: Globally install the official scaffolding tool using npm.
2. Generate Project: Create the standard project layout using the ng new command.
3. Launch Dev Server: Use ng serve to start a live reload server accessible at http://localhost:4200/.

Practical Example Using Angular Signals

The snippet below demonstrates a standalone component (src/app/app.component.ts) using Signals to manage local state cleanly without unnecessary template re-renders.

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

@Component({
  selector: 'app-root',
  standalone: true,
  template: `
    <div style="padding: 20px; font-family: sans-serif;">
      <h1>Counter: {{ counter() }}</h1>
      <button (click)="increment()">Increment by 1</button>
    </div>
  `
})
export class AppComponent {
  // Initialize signal with a default value of 0
  counter = signal(0);

  increment() {
    // Update signal state reactively
    this.counter.update(v => v + 1);
  }
}

Connecting Angular to a PHP Backend

Because Angular operates entirely on the client side inside the browser, it never connects directly to a SQL database. Instead, data exchanges happen over a REST API: a PHP backend fetches database records and returns JSON responses, while Angular consumes those endpoints using the built-in HttpClient module to render dynamic data instantly.