Calling Backend API with Angular

If you are working with Angular, you may need to make API calls to your backend server in order to fetch or send data. In this tutorial, we will walk through the process of making an API call in Angular.

Setting Up Angular Project

Before we can make API calls, we need to have an Angular project set up. If you haven’t already set up an Angular project, you can do so by running the following command in your terminal:


ng new my-angular-app


This will create a new Angular project named “my-angular-app”. Once the project is set up, navigate into the project directory and open it in your code editor.

Making the API Call

Now that we have our Angular project set up, we can start making API calls. First, we need to import Angular’s HttpClient module in our app module. Open the app.module.ts file and add the following code:

“`typescript
import { BrowserModule } from ‘@angular/platform-browser’;
import { NgModule } from ‘@angular/core’;
import { HttpClientModule } from ‘@angular/common/http’;

import { AppComponent } from ‘./app.component’;

@NgModule({
declarations: [
AppComponent
],
imports: [
BrowserModule,
HttpClientModule
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }
“`

Next, we can make an API call in one of our components. Open the component where you want to make the API call and add the following code:

“`typescript
import { Component, OnInit } from ‘@angular/core’;
import { HttpClient } from ‘@angular/common/http’;

@Component({
selector: ‘app-my-component’,
templateUrl: ‘./my-component.component.html’,
styleUrls: [‘./my-component.component.css’]
})
export class MyComponent implements OnInit {
constructor(private http: HttpClient) { }

ngOnInit(): void {
this.http.get(‘https://api.example.com/data’)
.subscribe((data) => {
console.log(‘Data received:’, data);
});
}
}
“`

In this example, we are using Angular’s HttpClient to make a GET request to https://api.example.com/data. When the response is received, we log the data to the console. You can modify this code according to your API endpoint and the data you want to send or receive.

Conclusion

That’s it! You have successfully made an API call in your Angular project. Making API calls is an essential part of web development, and Angular’s HttpClient module makes it easy to do so. You can now use this knowledge to fetch and send data to your backend server within your Angular application.