Angular CRUD – 4: How to confirm & delete data using API in Angular

In this tutorial, we will learn how to confirm and delete data using API in Angular. We will create a simple CRUD application and use Angular’s HttpClient module to make HTTP requests to the API to delete data.

Step 1: Create a delete confirmation dialog

The first step is to create a confirmation dialog to ask the user to confirm the deletion of the data. We can use Angular Material Dialog component to create a simple confirmation dialog box. Here’s a sample code to create a confirmation dialog:

   import { MatDialog } from '@angular/material/dialog';

   export class DeleteConfirmationDialogComponent {
       constructor(public dialogRef: MatDialogRef) {}

       onNoClick(): void {
           this.dialogRef.close();
       }
   }
   

Step 2: Implement the delete data functionality

Once the user confirms the deletion, we can implement the delete data functionality using Angular’s HttpClient module to make a DELETE request to the API endpoint. Here’s a sample code to delete data using API in Angular:

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

   export class DataService {
       constructor(private http: HttpClient) {}

       deleteData(id: number) {
           return this.http.delete(`/api/data/${id}`);
       }
   }
   

Step 3: Call the delete data function from the component

Finally, we can call the delete data function from the component when the user confirms the deletion. Here’s a sample code to call the delete data function from the component:

   import { Component } from '@angular/core';
   import { DataService } from './data.service';

   @Component({
       selector: 'app-delete-data',
       template: `
           Delete Data
       `
   })
   export class DeleteDataComponent {
       constructor(private dataService: DataService) {}

       confirmDelete() {
           // Call the delete data function from the data service
           this.dataService.deleteData(1).subscribe(() => {
               // Data deleted successfully
           });
       }
   }
   

By following these steps, we can confirm and delete data using API in Angular. This allows us to create a robust CRUD application with full data management capabilities.