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ANGULAR Tutorial
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Data binding (interpolation, property binding, event binding)

Data binding in Angular is a powerful feature that facilitates the seamless exchange and synchronization of data between the application’s view (UI) and the underlying component. Let’s delve into the three primary types of data binding: Interpolation, Property Binding, and Event Binding, exploring their significance and usage within Angular applications.

1. Interpolation:

What is Interpolation in Angular?

Interpolation is a one-way data binding technique used to display dynamic data values within the HTML template. It involves embedding expressions within double curly braces {{ }}.


<p>Welcome, {{ username }}!</p>

In this example, username is a variable from the component that gets rendered dynamically within the paragraph tag.

2. Property Binding:

Understanding Property Binding:

Property binding allows you to set the value of an HTML element property to a data property in the component. It binds data from the component to an HTML element property using square brackets [].


<img [src]="imageUrl">

Here, imageUrl is a property in the component that binds its value to the src attribute of the img tag, dynamically changing the image displayed based on the imageUrl property value.

3. Event Binding:

Exploring Event Binding:

Event binding enables you to listen and respond to user events, such as clicks, keypresses, or mouse movements. It triggers methods or functions in the component when events occur using parentheses ().


<button (click)="onButtonClick()">Click me</button>

In this example, the onButtonClick() method in the component gets called whenever the button is clicked.

Benefits of Data Binding in Angular:

  • Efficient Updates: Data binding automates the process of updating the view whenever the data changes in the component, ensuring a responsive user interface.
  • Reduced Boilerplate Code: It simplifies the codebase by eliminating the need for manual DOM manipulation or event handling, enhancing development efficiency.
  • Dynamic User Interaction: Enables seamless interaction between users and applications, facilitating a more engaging user experience