Summary of #Angular 17 - Episode - 07 | Data Binding | Hindi - Theory

Main Ideas and Concepts

Introduction to Data Binding
Data Binding is essential for communication between the template (HTML) and the business logic (component TS) in Angular applications. It allows dynamic content to be displayed rather than static content, enhancing the intelligence of the application.
Types of Data Binding
- One-Way Data Binding
  - String Interpolation: Sending data from the component to the HTML template using curly braces (e.g., {{ variableName }}).
  - Property Binding: Passing data to a property of an HTML element using square brackets (e.g., [propertyName]="variableName").
  - Event Binding: Sending data from the HTML back to the component when an event occurs (e.g., button clicks) using parentheses (e.g., (eventName)="eventHandler()").
- Two-Way Data Binding
  Utilizes ngModel, which combines both property and Event Binding. Automatically updates the component when the user inputs data in the HTML, and vice versa.
Examples of Data Binding
Described the interaction between component logic and HTML through various binding methods. Explained the mechanics of how data flows in one-way and two-way binding scenarios.

One-Way Data Binding
- Use String Interpolation for displaying component data in HTML:
  Syntax: {{ variableName }}
- Use Property Binding to bind component properties to HTML elements:
  Syntax: [propertyName]="variableName"
- Use Event Binding to handle events and send data back to the component:
  Syntax: (eventName)="eventHandler()"
Two-Way Data Binding
Implement using ngModel for form inputs:

Syntax: [(ngModel)]="variableName"

This allows for automatic updates between the input field and the component variable.