Angular Blur Event on Input Example

Angular Blur Event on Input is an Angular event binding it triggers when user removes the focus from the input element. Input events in angular can be handled using input and output decorators and in this tutorial we will learn Angular Blur Event on Input with Example. In core javascript we use onBlur event to handle the focus out events of input but in angular it there is different way to handle the input events like for blur event we use @output decorator to input element and to handle the event of key up we use (blur) attribute.

Angular Blur Event on Input using (blur)

Angular is most popular frontend framework and it has its on guidelines to handle events, forms, focus ,rendering etc. In this example we will implement a Simple blur Event and then we will handle it in typescript component file.

this example of (blur) in angular will work in all angular version including angular 2, angular 6, angular 7, angular 8, angular 9, angular 10, angular 11, angular 12, angular 13 and angular 14 application.

Simplest way to use Blur is as follow

<input (blur)="onFocusChange($event)" 
    type="text" 
    placeholder="Enter new PIN" 
/> 

Here we simply assigned the (blur) to input element and then handled the event in component as above.

onFocusChange(event:any) { 
  alert("Focus Out");
}

Let’s take an example of it

Step 1 : Create an angular app

First step is to setup an angular app using below command

ng new example-app

Step 2: Create a Component

Create a component and a method

ng g c hello-world

import { Component, OnInit } from '@angular/core';
import { ActivatedRoute } from '@angular/router';

@Component({
  selector: 'app-hello-world',
  templateUrl: './hello-world.component.html',
  styleUrls: ['./hello-world.component.css'],
})
export class HelloWorldComponent implements OnInit {
  
  constructor() {
  }
  onFocusChange(event:any) {
    alert("Focus Out");
  }
  ngOnInit() {}
}

Here we used to focusOut method to handle the input

Step 3 : Create template and add html

Now, add simple html template with input field

<h2>Angular blur Event on Input Example</h2>

<input (blur)="onFocusChange($event)" 
    type="text" 
    placeholder="Enter new PIN" 
/>