Q1. What is Angular?
Angular is a TypeScript-based open-source web application framework developed by Google. It is used for building dynamic, single-page applications (SPAs). Angular provides a complete solution for front-end development with features like two-way data binding, dependency injection, modular architecture, and a powerful CLI. It follows component-based architecture where the UI is built using reusable components.
Q2. What are the key differences between AngularJS and Angular?
AngularJS (version 1.x) is the older JavaScript-based framework, while Angular (versions 2+) is a complete rewrite using TypeScript. Angular uses a component-based architecture instead of AngularJS''s controller-scope approach. Angular has better performance, mobile support, and uses dependency injection throughout. AngularJS uses two-way data binding by default, while Angular offers more control with unidirectional data flow and change detection.
Q3. Why should you use Angular for web development?
Angular provides a comprehensive framework with built-in features like routing, forms, HTTP client, and testing utilities. It uses TypeScript for better tooling, type safety, and maintainability. Angular''s dependency injection system makes code more modular and testable. The CLI simplifies development tasks like building, testing, and deployment. It''s backed by Google and has a large ecosystem and community.
Q4. What is TypeScript and why is it used in Angular?
TypeScript is a superset of JavaScript that adds static typing, classes, interfaces, and other modern features. Angular is built with TypeScript and recommends using it for application development. TypeScript provides better IDE support, early error detection, and improved code maintainability. It compiles to plain JavaScript and works in any browser.
Q5. What is a single-page application (SPA)?
An SPA is a web application that loads a single HTML page and dynamically updates content as the user interacts with the app, without reloading the entire page. Angular is designed for building SPAs. It uses client-side routing to load different views, and data is fetched asynchronously from the server. This provides a smoother, more app-like user experience.