What is typically loaded in a single-page application after the initial load?

In a single-page application (SPA), the primary goal is to provide a smooth and seamless user experience without requiring full page reloads. After the initial load, which includes the basic structure and framework of the application, SPAs generally fetch additional resources on demand. This means that as a user interacts with the application, only the necessary HTML, JavaScript, and CSS resources are loaded dynamically to update the content of the page without refreshing it entirely.

This approach enhances performance and responsiveness, as it minimizes the amount of data transferred over the network and reduces load times. By loading only the additional resources as needed, SPAs can react quickly to user interactions and provide a more fluid experience. This is in contrast to traditional web applications that typically reload entire pages for every user action.