Creating a Custom Component | Components | Angular 12+

Introduction

In this tutorial, you will learn how to create custom components in Angular 12+. Components are fundamental building blocks of Angular applications, allowing you to structure your app effectively. This guide will walk you through the process of creating a header and a navbar component for your Angular application, enhancing your project's organization and functionality.

Step 1: Set Up Your Angular Project

Before creating components, ensure that you have an Angular project set up. If you haven't already done so, follow these steps:

1. Install Angular CLI (if not installed):

   npm install -g @angular/cli
   

2. Create a new Angular application:

   ng new my-angular-app
   

3. Navigate to your project directory:

   cd my-angular-app
   

4. Serve the application to see it in action:

   ng serve
   

   Open your browser and go to http://localhost:4200 to view your application.

Step 2: Generate the Header Component

Next, you will create a header component that will be used to display the title or branding of your application.

1. Generate the header component using Angular CLI:

   ng generate component header
   

   This command creates a new folder named header in the src/app directory, containing the necessary files.

2. Modify the header component template:

   • Open header.component.html and add your desired HTML structure. For example:

     <header>
       <h1>My Angular Application</h1>
     </header>
     

3. Style the header (optional):

   • Add styles in header.component.css to customize the appearance.

Step 3: Generate the Navbar Component

Now it's time to create the navbar component that will facilitate navigation within your application.

1. Generate the navbar component using Angular CLI:

   ng generate component navbar
   

2. Modify the navbar component template:

   • Open navbar.component.html and create your navigation structure. For example:

     <nav>
       <ul>
         <li><a href="/">Home</a></li>
         <li><a href="/about">About</a></li>
         <li><a href="/contact">Contact</a></li>
       </ul>
     </nav>
     

3. Style the navbar (optional):

   • Use navbar.component.css to add custom styles.

Step 4: Include Components in Your App

To display the header and navbar components in your application, you need to include them in your main application template.

1. Open app.component.html:

   • Add the header and navbar components where you want them to appear:

     <app-header></app-header>
     <app-navbar></app-navbar>
     <router-outlet></router-outlet>
     

2. Ensure the components are properly imported:

   • Angular automatically handles component imports, but ensure your components are declared in app.module.ts if you encounter issues.

Conclusion

Congratulations! You have successfully created a custom header and navbar component in your Angular 12+ application. These components can now be reused throughout your project, enhancing code organization and maintainability.

Key Takeaways

• Components are essential building blocks of Angular applications.
• You can easily create components using Angular CLI.
• Customizing components with HTML and CSS allows for better user experience.

Next Steps

• Explore adding additional components to your application.
• Learn how to manage component interactions and data binding.
• Consider implementing routing for a more dynamic navigation experience.