Angular Components

Angular Components

In Angular, the components are the main building block that represents a portion of the view. Components are nothing rather than a combination of HTML, CSS, and JavaScript. There are multiple ways to create the component. Let’s see how to create and use the component in our Angular application.

First, let’s create a component manually by taking the following steps.

• Open the newly created Angular apps in any of your favorite IDE (Integrated Development Environment).
• Once you’ve opened the apps in IDE. Let’s find the src > app folder. Create another folder where the component associate files can be stored. For example, we have created a welcome folder, but you can give any name you want.
• Create a new file inside the welcome folder by following the component creating format component-name.component.ts. So, for example, our component name would be welcome.component.ts.
• After you created the new component file open it in your IDE. At the top of the file add the following import statement.
  

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

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• After that add the @Compoent decorator to define the HTML, and CSS along with the component name of the selector.
  

  
  @Component({
      selector: 'app-welcome',
      templateUrl: './welcome.component.html',
      styleUrls: ['./welcome.component.css']
      })
  

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• Finally, add the class that includes the code of the component.
  

  
  export class WelcomeComponent {
      //Component code statement goes here
  }
  

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This is what it looks like after you have completed all of the above steps.

welcome.component.ts

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

@Component({
    selector: 'app-welcome',
    templateUrl: './welcome.component.html',
    styleUrls: ['./welcome.component.css']
    })

    export class WelcomeComponent {
        //Component code statement goes here
    }

welcome.component.html

<h1> Welcome to the new Angular application.</h1>

welcome.component.css

h1 {
    font-weight: normal;
    color: blue;
}

Here is the screenshot of the folder structure.

There is a couple of more steps to take to see how our component renders in the web browser. Let's move on to those steps. First, open the src > app > app.module.ts and include the below code to that file.

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';

import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { WelcomeComponent } from './welcome/welcome.component'; //Import welcome component

@NgModule({
    declarations: [
    AppComponent,
    WelcomeComponent //include the WelcomeComponent
    ],
    imports: [
    BrowserModule,
    AppRoutingModule
    ],
    providers: [],
    bootstrap: [AppComponent]
})
export class AppModule { }

Open the src > app > app.component.html and the following code.

<app-welcome></app-welcome>

Let's open the CLI/Terminal > go to the application folder and run the following highlighted command to build and serve the apps to the browser.

C:\Users\17193\Documents\__DEMO_PROJECTS__\Angular\AngularApp>ng serve -o

The application will be open in default browser.

Well done, you have understood the basics of the Angular component.