How to Integrate a GET API in Angular and Display Records

How to Integrate a GET API in Angular and Display Records

Introduction:
In this documentation, we will guide you through the process of integrating a GET API in an Angular application and displaying the retrieved records in a step-by-step manner. We'll provide code examples and explanations to help you understand the process.

Prerequisites:
Before we begin, ensure you have the following prerequisites:

1. Node.js and npm installed on your system.
2. Angular CLI installed globally.

Step 1: Create a New Angular Project
Open your terminal and run the following command to create a new Angular project:

bash
ng new angular-get-api-demo

Step 2: Set Up HTTP Client Module
Navigate to the newly created project directory:

bash
cd angular-get-api-demo

Next, import the HttpClientModule in your app.module.ts file:

typescript
import { HttpClientModule } from '@angular/common/http';

@NgModule({
  imports: [
    // other modules...
    HttpClientModule
  ],
  // other configurations...
})
export class AppModule { }

Step 3: Create a Service to Fetch API Data
Generate a new service to handle API requests:

bash
ng generate service api

Replace the content of the api.service.ts file with the following code:

typescript
import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { Observable } from 'rxjs';

@Injectable({
  providedIn: 'root'
})
export class ApiService {
  private apiUrl = 'https://api.example.com/data'; // Replace with your API endpoint URL

  constructor(private http: HttpClient) { }

  getRecords(): Observable<any> {
    return this.http.get<any>(this.apiUrl);
  }
}

Step 4: Display Data in a Component
Generate a new component to display the fetched data:

bash
ng generate component record-list

In the record-list.component.ts file, add the following code:

typescript
import { Component, OnInit } from '@angular/core';
import { ApiService } from '../api.service';

@Component({
  selector: 'app-record-list',
  templateUrl: './record-list.component.html',
  styleUrls: ['./record-list.component.css']
})
export class RecordListComponent implements OnInit {
  records: any[];

  constructor(private apiService: ApiService) { }

  ngOnInit(): void {
    this.fetchRecords();
  }

  fetchRecords(): void {
    this.apiService.getRecords().subscribe(
      (data: any[]) => {
        this.records = data;
      },
      (error) => {
        console.error('Error fetching records:', error);
      }
    );
  }
}

Step 5: Create the Template to Display Records
In the record-list.component.html file, add the following code to display the records:

html
<h2>Records:</h2>
<ul>
  <li *ngFor="let record of records">
    <!-- Display record properties here -->
  </li>
</ul>

Step 6: Styling (Optional)
You can style the records list in the record-list.component.css file as per your requirements.

Step 7: Display the Component
Finally, add the RecordListComponent to your main app.component.html file to see the records on the screen.

Conclusion:
Congratulations! You have successfully integrated a GET API in your Angular application and displayed the retrieved records. You can now customize and expand this implementation to suit your specific use case. Happy coding!