Summary  
This chapter covers the core architectural concepts of a component-based UI framework, including modular components, declarative directives, dependency-injected services, routing, and two-way data binding.  

General domain of usage  
Single-page web applications

The **key principles** of **Angular** help you build **applications** with less effort and more organized **code**. They make **developers' work** easier by allowing them to focus on **tasks** instead of getting caught up in the **details**. **Angular**, as a set of **tools**, helps bring all the parts together and makes the **application** user-friendly.

In the following chapters, you'll get hands-on experience with these core principles, applying them in practice as you build real Angular applications.

Note

What do the key principles of Angular do?

Explore Angular, a powerful framework for building dynamic web applications. Learn about components, data binding, directives, pipes, services, modules, and routing while setting up projects and creating interactive, well-structured applications.

Key Principles of the Framework

1. What do the key principles of Angular do?

2. What are components in Angular?

3. What does a directive do in Angular?