Angular Templates: Interpolation

🎯 What is Interpolation in Angular?

Interpolation is a technique in Angular templates that allows you to display data from your component class into the HTML view.

It uses the double curly braces:

{{ data }}

Interpolation = Component data → Template display


Basic Example

Component (TS file)


Template (HTML file)


Output:

👉 Welcome Sanjit!


🧠 What Can You Do with Interpolation?

1️⃣ Display Variables



2️⃣ Perform Simple Calculations



3️⃣ Use Methods



4️⃣ Access Object Properties



5️⃣ Convert or Format Data



⚠️ What Interpolation Cannot Do

❌ You cannot assign values:

{{ x = 10 }} <-- Not allowed

❌ You cannot use if-else or loops directly:
(Use *ngIf and *ngFor instead)

❌ No new objects or heavy logic.

Interpolation should remain simple and fast.


💡 How Angular Processes Interpolation

  1. Looks at {{ ... }}

  2. Reads data from Component class

  3. Updates the DOM automatically

  4. If data changes → UI updates instantly
    (This is Angular’s data-binding system)


✔️ Real-Life Example

TS


HTML



🎉 Summary: Interpolation in One Line

👉 Interpolation binds component data into HTML using {{ }} and shows dynamic content on the page.

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