How do I set up environment and create first app?

# Prerequisites - Install Node.js (active LTS version) from [nodejs.org](https://nodejs.org/en/download). Verify: `node --version` and `npm --version`. 87 # Install Angular CLI ``` npm install -g @angular/cli ``` On Windows PowerShell: `Set-ExecutionPolicy -Scope CurrentUser -ExecutionPolicy RemoteSigned`. 87 # Install VS Code Download from [code.visualstudio.com](https://code.visualstudio.com/) and add Angular Language Service extension. # Create and Run App ``` ng new my-first-app cd my-first-app ng serve --open ``` App runs at http://localhost:4200. Edit `src/app/app.component.html` to see hot reload.

How do I master composition with components?

Follow [official first app tutorial](https://angular.dev/tutorials/first-app). 59 # Key Actions - Generate component: `ng generate component houses` - Build a house listing app: list rent houses, show details. - Edit `app.component.ts`: add selector, template, class properties. ```typescript export class AppComponent { title = 'my-first-app'; } ``` Understand: Components encapsulate HTML, CSS, logic.

How do I implement reactivity with signals?

Read [signals essentials](https://angular.dev/essentials/signals-essentials). 84 # Practice ```typescript import { signal } from '@angular/core'; houses = signal([ /* array */ ]); ``` - Add signal for house data. - Update list reactively: `houses.update()`. - Follow [learn signals tutorial](https://angular.dev/tutorials/learn-signals).

How do I build dynamic interfaces with templates?

[Templates essentials](https://angular.dev/essentials/template-essentials). 84 # Directives & Binding - `*ngFor` for lists: ` ` - `*ngIf`, `@defer` for conditional. - Input/output bindings. Extend house app: dynamic details view.

How do I handle forms and dependency injection?

# Forms with Signals [Forms essentials](https://angular.dev/essentials/forms-essentials). 84 ```typescript form = model({ name: '' }); ``` Add house form. # Dependency Injection [DI essentials](https://angular.dev/essentials/di-essentials). - `inject(Service)` for services. # Build & Deploy `ng build` Serve dist/ folder. Complete house app.

Master Angular Essentials: Build Apps in 5 Steps

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Step-by-Step Guide

1

Prerequisites

Install Node.js (active LTS version) from nodejs.org.

Verify: node --version and npm --version.

Install Angular CLI

npm install -g @angular/cli

On Windows PowerShell: Set-ExecutionPolicy -Scope CurrentUser -ExecutionPolicy RemoteSigned.

Install VS Code

Download from code.visualstudio.com and add Angular Language Service extension.

Create and Run App

ng new my-first-app
cd my-first-app
ng serve --open

App runs at http://localhost:4200. Edit src/app/app.component.html to see hot reload.

Why this step matters:

-Establishes a working dev setup for hands-on practice
-Enables immediate experimentation with Angular code

1-2 hours

Node.js, npm, Angular CLI, VS Code, Terminal

$0

Definition of Done

•Node.js LTS installed and verified
•Angular CLI installed globally
•First app created and serving at localhost:4200
•Changes to app component reflect instantly

Common Mistakes to Avoid

❌ Installing non-LTS Node.js version

→Download active LTS from nodejs.org

❌ Permission denied on npm install

→Use sudo (Unix) or set ExecutionPolicy (Windows)

❌ 'ng' command not found

→Restart terminal and ensure npm global path is in $PATH

2

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Learning Resources

📖 Online Courses

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🌐 Helpful Websites

Official Angular Documentation

documentation

Tutorials, essentials, API reference for Angular 21+

Angular GitHub

github

Core framework source code and releases

🛠️ Useful Tools

Angular CLI

CLI

Scaffold, build, test Angular apps

Node.js

Runtime

Runtime for Angular development

VS Code

IDE

Editor with Angular Language Service

Master Angular Essentials: Build Apps in 5 Steps