Angular Check ngIf Null or Empty | Angular Check If Array is Empty

By Hardik Savani | April 2, 2020 | Category : Angular


Hi Dev,

This tutorial will provide example of how to check array is empty in angular. i would like to show you angular check if string is empty or null. This article will give you simple example of angular check if object is empty ngif. it's simple example of angular check ngif array is empty. Alright, let’s dive into the steps.

In this post, i will give three examples with checking condition with ngIf in angular. You can easily check with angular 6, angular 7, angular 8, angular 9 and angular 10.

1) Angular Check ngIf Null or Not

2) Angular Check ngIf String is Empty or Not

3) Angular Check ngIf Array is Empty or Not

1) Angular Check ngIf Null or Not

src/app/app.component.ts

import { Component } from '@angular/core';

@Component({

selector: 'my-app',

templateUrl: './app.component.html',

styleUrls: [ './app.component.css' ]

})

export class AppComponent {

name = 'Angular';

myVar = null;

}

src/app/app.component.html

<h1>angular ngif check null example - itsolutionstuff.com</h1>

<div *ngIf="myVar">

<p>Variable is not null.</p>

</div>

<div *ngIf="!myVar">

<p>Variable is null.</p>

</div>

2) Angular Check ngIf String is Empty or Not

src/app/app.component.ts

import { Component } from '@angular/core';

@Component({

selector: 'my-app',

templateUrl: './app.component.html',

styleUrls: [ './app.component.css' ]

})

export class AppComponent {

name = 'Angular';

myVar = "";

}

src/app/app.component.html

<h1>angular ngif check empty example - itsolutionstuff.com</h1>

<div *ngIf="myVar">

<p>Variable is not empty.</p>

</div>

<div *ngIf="!myVar">

<p>Variable is empty.</p>

</div>

3) Angular Check ngIf Array is Empty or Not

src/app/app.component.ts

import { Component } from '@angular/core';

@Component({

selector: 'my-app',

templateUrl: './app.component.html',

styleUrls: [ './app.component.css' ]

})

export class AppComponent {

name = 'Angular';

myVar = [];

}

src/app/app.component.html

<h1>angular ngif check array empty example - itsolutionstuff.com</h1>

<div *ngIf="myVar?.length">

<p>Array is not empty.</p>

</div>

<div *ngIf="!myVar?.length">

<p>Array is empty.</p>

</div>

I hope it can help you...




Hardik Savani
My name is Hardik Savani. I'm a full-stack developer, entrepreneur and owner of Aatman Infotech. I live in India and I love to write tutorials and tips that can help to other artisan. I am a big fan of PHP, Javascript, JQuery, Laravel, Codeigniter, VueJS, AngularJS and Bootstrap from the early stage.
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