Introduction

Angular is a platform for building mobile and desktop web applications. At the core of Angular is the component-based architecture, which allows developers to create reusable UI components that manage their own data and behavior.

What are Components?

Components are the fundamental building blocks of Angular applications. Each component encapsulates its HTML template, styling, and logic, making it easy to manage and reuse.

Component Structure

Each Angular component consists of:

• Decorator: A function that adds metadata to the class.
• Class: The actual implementation of the component.
• Template: The HTML view that renders the component.
• Styles: The CSS that styles the component.

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

@Component({
  selector: 'app-hello-world',
  template: `
Hello, World!
`,
  styles: [`h1 { font-family: Lato; }`]
})
export class HelloWorldComponent {}
                

Creating a Component

Follow these steps to create a new component:

1. Open your Angular project in the terminal.
2. Run the Angular CLI command: ng generate component component-name
3. This generates the component files in the specified directory.
4. Import the new component in the module where you want to use it.
5. Add the component's selector to an HTML template.

Best Practices

• Keep components small and focused on a single functionality.
• Reuse components across your application to avoid redundancy.
• Use input properties for passing data and output properties for event emission.
• Style components using encapsulated styles to prevent global styles from affecting them.

FAQ