🔗 Data Binding in Angular 20

Connect Your UI to Your Logic — Seamlessly!

In this post, we’ll explore one of the most essential features of Angular — Data Binding. This is how you connect your TypeScript logic (component) to the HTML template (UI) so they can talk to each other.

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🧠 What is Data Binding?

Data Binding in Angular allows you to bind variables from the component class to your HTML template, enabling dynamic and interactive applications.

Angular 20 supports four main types of bindings:

1. Interpolation

2. Property Binding

3. Event Binding

4. Two-Way Binding (we’ll cover this separately in the Forms section)

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1️⃣ Interpolation — {{ value }}

Use case: Display data from the component class into the HTML.

✅ Example:

// app.ts
export class App {
  title = 'Debug Diaries!';
}

<!-- app.html -->
<h1>Welcome to {{ title }}</h1>

🧾 Output:

Welcome to Debug Diaries!

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2️⃣ Property Binding — [property]="value"

Use case: Bind a DOM property (like src, disabled, etc.) to a class variable.

✅ Example:

// app.ts
export class App {
  imageUrl = 'https://angular.io/assets/images/logos/angular/angular.svg';
}

<!-- app.html -->
<img [src]="imageUrl" alt="Angular Logo">

🎯 This binds the src property of the <img> tag to the imageUrl variable in the class.

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3️⃣ Event Binding — (event)="handlerFunction()"

Use case: Handle user interactions like clicks, key presses, etc.

✅ Example:

// app.ts
export class App {
  message = '';

  showMessage() {
    this.message = 'Button clicked!';
  }
}

<!-- app.html -->
<button (click)="showMessage()">Click Me</button>
<p>{{ message }}</p>

🧾 Output:

When the button is clicked, "Button clicked!" will appear.

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💡 Summary Table

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📌 What’s Next?

In the next blog, we’ll cover:

🧩 Two-Way Data Binding and Angular Forms
You’ll learn how to build forms and sync user input with your components in real-time.

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🔗 Let's Connect and Explore More!

📖 Read the full series: ngtushar.hashnode.dev/angular-series
💻 Source Code on GitHub: github.com/Tushar1409-hj
🔗 Connect with me on LinkedIn: linkedin.com/in/tushar1409

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