Angular httpclient delete example
In this video we will discuss deleting data on the server using Angular HttpClient service. To issue a DELETE request, we use HttpClient service delete() method.
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In employee.service.ts file, include the following deleteEmployee() method
baseUrl = 'http://localhost:3000/employees';
deleteEmployee(id: number): Observable[void] {
return this.httpClient.delete[void](`${this.baseUrl}/${id}`)
.pipe(catchError(this.handleError));
}
Code Explanation:
1. deleteEmployee() method takes the ID of the employee to delete as a parameter
2. delete() method does not return anything so we have set the return type to void
3. The URL that is passed as a parameter to the HttpClient delete() method has the ID of the employee to delete
Delete button click event handler is in DisplayEmployeeComponent. So modify deleteEmployee() method in display-employee.component.ts file as shown below.
deleteEmployee() {
this._employeeService.deleteEmployee(this.employee.id).subscribe(
() =] console.log(`Employee with ID = ${this.employee.id} Deleted`),
(err) =] console.log(err)
);
this.notifyDelete.emit(this.employee.id);
}
The success callback function logs the ID of the deleted employee to the console and the error callback function logs the error to the console.
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