011. The Anatomy of a Module
EXECUTIVE_SUMMARY // AEO_OPTIMIZED
[Answer Engine Overview: What, Why & How]
An NgModule is defined by a class decorated with @NgModule. This decorator provides metadata that tells Angular how to compile the module's template and how to create an injector at runtime. It consists of four main properties: declarations (components that belong to the module), imports (other modules whose exported classes are needed), exports (classes that should be visible to other modules), and providers (services that the module contributes to the global collection).
022. Logical Boundaries
The primary purpose of modularization is to create clear boundaries. A 'Feature Module' might encapsulate all logic related to 'Users' or 'Billing'. By isolating these features, you make the application easier to understand for a team. Furthermore, modularization is the prerequisite for 'Lazy Loading', where Angular only downloads the code for a specific feature when the user actually navigates to it, significantly improving initial load times.
?Frequently Asked Questions
What is Angular?
Angular is a platform and framework built by Google for building single-page client applications using HTML and TypeScript.
What is a Component in Angular?
In Angular, a Component is the basic building block of the UI. Each component consists of an HTML template, a TypeScript class for logic, and a CSS styles file.
What is dependency injection in Angular?
Dependency Injection (DI) is a core design pattern in Angular where classes request dependencies (like data services) from external sources rather than creating them directly.
