by Sai gowtham

Angular 8 attribute binding tutorial

In this tutorial, we are going to learn about how to dynamically bind HTML attributes in angular.

This is our starter code.

app.component.html
<div>
   <img />
</div>
app.component.ts
import { Component } from '@angular/core';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  myimg = 'https://images.unsplash.com/photo-1519058497187-7167f17c6daf';}

In the above code, we have an expression myimg and we need to bind the src attribute of an img element to myimg expression.

Binding attribute to an expression

In angular, we can dynamically bind an attribute to expression by using [attributename] square brackets syntax.

app.component.html
<div>
    <img [src]="myimg" height="250px" /></div>

angular-img-attribute-binding

Other HTML attributes

We can also bind other HTML attributes similarly by using this [] syntax.

  <!-- disabled button -->
<button [disabled] = "isActive">Change image</button>
  <!-- href -->
<a [href] = "url" >Google</a>

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