How can I handle advanced HTTP requests in Angular using HttpClient?

How can I handle advanced HTTP requests in Angular using HttpClient?

You can use Angular's HttpClient to handle advanced requests like GET, POST, PUT, DELETE, and more. What specific functionality are you looking for?

I want to know how to send custom headers with my requests.

You can set custom headers by using the HttpHeaders class. Here's an example:

import { HttpHeaders } from '@angular/common/http';

const headers = new HttpHeaders({
  'Authorization': 'Bearer your-token',
  'Custom-Header': 'value'
});

this.httpClient.get('your-api-url', { headers }).subscribe(response => {
  console.log(response);
});

What about handling errors in HTTP requests?

You can handle errors using the catchError operator from RxJS. Here's a simple example:

import { catchError } from 'rxjs/operators';

this.httpClient.get('your-api-url').pipe(
  catchError(error => {
    console.error('Error occurred:', error);
    return throwError(error);
  })
).subscribe(response => {
  console.log(response);
});

Can I make concurrent requests?

Yes, you can use the forkJoin operator to make concurrent requests. Here's how:

import { forkJoin } from 'rxjs';

forkJoin([
  this.httpClient.get('url1'),
  this.httpClient.get('url2')
]).subscribe(results => {
  console.log('Results:', results);
});