Angular Dependency Injection (DI) is a powerful design pattern that allows developers to create modular and maintainable applications. It promotes loose coupling, making it easier to manage dependencies across various components. By utilizing DI, developers can easily swap implementations, test individual components in isolation, and improve overall code readability. The core idea revolves around providing a service or a dependency to a class instead of having the class instantiate the service itself, fostering better separation of concerns.

To fully understand the mechanism of Angular Dependency Injection, it's essential to explore its key components: injectors, providers, and services. An injector is responsible for creating and delivering instances of services, while providers define how those services are instantiated. In Angular, you can register a service in the root injector for application-wide access, or limit its scope to a specific module or component. Mastering these concepts will empower you to leverage the full potential of Angular DI, leading to cleaner and more efficient code.

When it comes to building dynamic web applications, adhering to the best practices in Angular is crucial for achieving optimal performance and maintainability. First on the list is to utilize modules effectively. By breaking your application into feature modules, you not only promote reusability but also improve the load time of your application. This modular approach enables lazy loading, which can significantly enhance the user experience by only loading what is necessary when it's needed.

Another essential practice is to employ reactive programming through Observables instead of traditional approaches. This encourages a more efficient way of handling asynchronous data streams and simplifies state management. Additionally, always keep your components clean by following the single responsibility principle, ensuring that each component does one thing well. These strategies, combined with proper dependency injection and Angular CLI utilization, can lead to more organized and scalable applications.

Angular is a robust framework that has gained significant popularity in modern web development due to its comprehensive set of features and tools. Developed by Google, Angular provides a powerful platform for building single-page applications (SPAs) with remarkable speed and efficiency. One of the standout features of Angular is its use of two-way data binding, which allows automatic synchronization between the model and the view. This leads to a more dynamic user experience without the need for excessive coding, enabling developers to focus on building high-quality applications.

Moreover, Angular's modular architecture empowers developers to work on components in isolation, promoting reusability and maintainability. With its dependency injection system, developers can easily manage services and improve the testability of their applications. The framework also offers a rich ecosystem of libraries and tools, such as the Angular CLI, which simplifies project setup and streamlines development processes. Overall, the combination of these features makes Angular a powerful choice for developers aiming to create scalable and performant web applications.