Mastering the Dependency Injection Design Pattern

Learn Dependency Injection principles to build cleaner, scalable, and maintainable applications.

What you'll learn
- What tightly coupled code is and why it reduces maintainability, testability, and flexibility.
- How to recognize directly instantiated dependencies (early binding) and their consequences.
- Apply Dependency Injection to create loosely coupled and maintainable applications
- Identify common myths about DI and explain its real purpose and benefits
- Use constructor, property, and method injection appropriately in design
- Recognize and avoid DI anti-patterns such as the Service Locator
- Detect and fix code smells like constructor over-injection and cyclic dependencies
- Compose applications using Pure DI without relying on containers
- Manage object lifetimes with Singleton, Scoped, and Transient configurations
- Implement cross-cutting concerns using Decorators and Interceptors
- Apply Aspect-Oriented Programming principles to improve software design

Requirements
- Learners should have basic knowledge of object-oriented programming and be familiar with TypeScript fundamentals.

Description
This course contains the use of artificial intelligence.

Do you want to write cleaner, more maintainable, and professional Angular applications?This course will teach youDependency Injection (DI)step by step, adapted from the best practices and principles of the classic bookDependency Injection: Principles, Practices, and Patterns, now applied in theTypeScript + Angular ecosystem.

You will learn how to:

Apply Dependency Injection to reduce coupling and increase code maintainability.

Master DI patterns like constructor, property, and method injection.

Recognize and avoid anti-patterns such as Service Locator.

Manage object lifetimes and dependencies in Angular applications.

Implement cross-cutting concerns with Decorators, Interceptors, and AOP-inspired techniques.

Use Angular’s DI container effectively while understanding when Pure DI is the best option.

This course is designed forTypeScript developerswho want to:

Improve code architecture and testability.

Build scalable, enterprise-level applications with confidence.

Strengthen their understanding ofSOLID principlesand modern software design.

By the end of this course, you will not only understandhow DI works, but alsowhy and when to use it, giving you the ability to create flexible, maintainable, and future-proof applications.

No matter if you are ajunior developer looking to level upor aprofessional aiming to sharpen architectural skills, this course will give you practical knowledge, real-world examples, and confidence to apply Dependency Injection in your daily work.

Who this course is for:
- This course is designed for developers who want to enhance their software architecture skills by creating cleaner, more flexible, and maintainable code through the use of Dependency Injection.
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