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How to Check Array is Empty in Angular?



Hi Dev,

Here, i will show you angular check if string is empty or null. it's simple example of angular check if object is empty ngif. i explained simply about angular check ngif array is empty. This post will give you simple example of ngif check if string is empty. Here, Creating a basic example of ngif check length of array angular.

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 and angular 9.

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...




April 26, 2020 | Category : Angular



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