Angular 14 Http Client & Http Services Example

Every App must important to send API request to another server. we can use HTTP client requests and get data and store data information to our server. as especially when you are working with angular, vue, react applications. you must have to learn how to run HTTP client requests with angular 14.

Here, I will give you a very simple example to get all data using API and storing data using API. we will use jsonplaceholder api for testing now. so we don't require to create a new API for it.

So, let's see the below example step on step how to create an HTTP service and how to use it.

Step 1: Create New App

You can easily create your angular app using bellow command:

ng new my-new-app

Step 2: Import HttpClientModule

In this step, we need to import HttpClientModule to app.module.ts file. so let's import it as like bellow:

src/app/app.module.ts

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
  
import { AppComponent } from './app.component';
import { HttpClientModule } from '@angular/common/http';
  
@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    HttpClientModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

Step 3: Create Service for API

Here, we need to create service for http client request. we will create service file and write client http request code. this service will use in our component file. So let's create service and put bellow code:

ng g s services/post

Now let's add code as like bellow:

src/app/services/post.service.ts

import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
@Injectable({
  providedIn: 'root'
})
export class PostService {
	private url = 'http://jsonplaceholder.typicode.com/posts';
	constructor(private httpClient: HttpClient) { }
	getPosts(){
		return this.httpClient.get(this.url);
	}
}

Step 4: Use Service to Component

Now we have to use this services to our app component. So let's updated code as like bellow:

src/app/app.component.ts

import { Component, OnInit } from '@angular/core';
import { PostService } from './services/post.service';
@Component({
	selector: 'app-root',
	templateUrl: './app.component.html',
	styleUrls: ['./app.component.css']
})
export class AppComponent implements OnInit {
	posts:any;
	constructor(private service:PostService) {}
	ngOnInit() {
		this.service.getPosts()
        .subscribe(response => {
			this.posts = response;
        });
	}
}

Now let's add code as like bellow:

Step 5: Updated View File

Now here, we will updated our html file. let's put bellow code:

src/app/app.component.html

<h1>Angular 14 HttpClient for Sending Http Request Example - codewale.com</h1>
<ul class="list-group">
	<li 
		*ngFor="let post of posts"
		class="list-group-item">
		{{ post.title }}
	</li>
</ul>

Run Angular App:

All the required steps have been done, now you have to type the given below command and hit enter to run the Angular app:

ng serve

Now, Go to your web browser, type the given URL and view the app output:

http://localhost:4200

I hope it can help you...