What is Single Page Application (SPA)?

A single page application is a web application or a website which provides a very fast and reactive experience to the users like a desktop application. It only reloads the current page rather that the entire application that’s why it is extremely fast.

A Single Page Application (SPA) is a web application or website that interacts with the user by dynamically rewriting the current page rather than loading entire new pages from the server. In other words, in an SPA, the entire application is contained within a single web page, and the content is updated dynamically as the user interacts with the application.

Key characteristics of SPAs include:

1. Dynamic Updates: SPAs use AJAX (Asynchronous JavaScript and XML) to fetch data from the server without reloading the entire page. This allows for a smoother, more responsive user experience.
2. Routing: SPAs typically use client-side routing to manage navigation within the application. This means that instead of making requests to the server for different pages, the application’s router handles URL changes and updates the view accordingly.
3. Improved Performance: Since SPAs only load the necessary resources (such as data or templates) rather than entire pages, they often provide faster load times and a more fluid user experience.
4. Rich Interactivity: SPAs often incorporate rich client-side functionality, such as animations, transitions, and real-time updates, to provide a more engaging user experience.
5. State Management: SPAs need to manage application state on the client side, often using libraries like Redux, MobX, or Angular’s built-in state management mechanisms.

Angular, as a modern front-end framework, is well-suited for building SPAs due to its powerful features like two-way data binding, dependency injection, and a robust routing system.