What is dependency injection in Angular? Dependency Injection (DI) is a design pattern in which objects receive their dependencies from an external source, not by creating them.

ngular has a built-in DI system that allows services to be injected into components or other

services.

Example:

constructor(private authService: AuthService) {}

Real-Time Example:

In an e-commerce app:

• Inject CartService into CartComponent to manage cart items.