What Is a Single Page Application (SPA)?


A Single Page Application (SPA) is a website that dynamically enhances user interaction by updating the existing page's content rather than reloading the entire page from the server. Traditional multi-page applications require reloading the entire page when a link is clicked. In contrast, SPAs employ technologies like AJAX (Asynchronous JavaScript and XML) and modern web frameworks to achieve dynamic content updates within the same page.

This web application type loads a single document initially and employs JavaScript APIs to modify the body content based on user interactions.

Although SPAs offer advantages like improved performance and a more dynamic user experience, they come with tradeoffs, including SEO challenges, increased effort for state maintenance, navigation implementation, and the need for effective performance monitoring.