Angular - HTTP DELETE Request Examples
Below is a quick set of examples to show how to send HTTP DELETE requests from Angular to a backend API.
Other HTTP examples available:
- Angular: GET, POST, PUT
- React + Fetch: GET, POST, PUT, DELETE
- React + Axios: GET, POST, PUT, DELETE
- Vue + Fetch: GET, POST, PUT, DELETE
- Vue + Axios: GET, POST
- Blazor WebAssembly: GET, POST
- Axios: GET, POST, PUT, DELETE
- Fetch: GET, POST, PUT, DELETE
Simple DELETE request
This sends an HTTP DELETE request to the JSONPlaceholder api which is a fake online REST api that includes a /posts/1 route that responds to DELETE requests with a HTTP 200 OK response. When the response is received the Angular component displays the status message 'Delete successful'.
ngOnInit() {
this.http.delete('https://jsonplaceholder.typicode.com/posts/1')
.subscribe(() => this.status = 'Delete successful');
}
Example Angular component at https://stackblitz.com/edit/angular-http-delete-examples?file=app/components/delete-request.component.ts
DELETE request with error handling
This sends a request to an invalid url on the api then assigns the error to the errorMessage component property and logs the error to the console.
The object passed to the request subscribe() method contains two callback functions, the next() function is called if the request is successful and the error() function is called if the request fails.
ngOnInit() {
this.http.delete('https://jsonplaceholder.typicode.com/invalid-url')
.subscribe({
next: data => {
this.status = 'Delete successful';
},
error: error => {
this.errorMessage = error.message;
console.error('There was an error!', error);
}
});
}
Example Angular component at https://stackblitz.com/edit/angular-http-delete-examples?file=app/components/delete-request-error-handling.component.ts
DELETE request with headers set
This sends the same request again with a couple of headers set, the HTTP Authorization header and a custom header My-Custom-Header.
The below headers are created as a plain javascript object, they can also be created with the HttpHeaders class, e.g. const headers = new HttpHeaders({ 'Authorization': 'Bearer my-token', 'My-Custom-Header': 'foobar' })
To set or update headers on an existing HttpHeaders object call the set() method, e.g. const headers = new HttpHeaders().set('Authorization', 'Bearer my-token')
ngOnInit() {
const headers = { 'Authorization': 'Bearer my-token', 'My-Custom-Header': 'foobar' };
this.http.delete('https://jsonplaceholder.typicode.com/posts/1', { headers })
.subscribe(() => this.status = 'Delete successful');
}
Example Angular component at https://stackblitz.com/edit/angular-http-delete-examples?file=app/components/delete-request-headers.component.ts
Prerequisites for making HTTP requests from Angular
Before making HTTP requests from your Angular app you need to do a couple of things.
1. Add the HttpClientModule to the imports array of your AppModule like below on lines 3 and 10.
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { HttpClientModule } from '@angular/common/http';
import { AppComponent } from './app.component';
@NgModule({
imports: [
BrowserModule,
HttpClientModule
],
declarations: [
AppComponent
],
bootstrap: [AppComponent]
})
export class AppModule { }
2. Import the HttpClient into your component and add it to the constructor() params like below on lines 2 and 8.
import { Component, OnInit } from "@angular/core";
import { HttpClient } from '@angular/common/http';
@Component({ selector: 'delete-request', templateUrl: 'delete-request.component.html' })
export class DeleteRequestComponent implements OnInit {
status;
constructor(private http: HttpClient) { }
ngOnInit() {
this.http.delete('https://jsonplaceholder.typicode.com/posts/1')
.subscribe(() => this.status = 'Delete successful');
}
}
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