Progressive Hydration A server rendered application uses the server to generate the HTML for the current navigation. Once the server has completed generating the HTML contents, which also contains the necessary CSS and JSON data to display the static UI correctly, it sends the data down to the client. Since the server generated the markup for us, the client can quickly parse this and display it on the screen, which produces a fast First Contentful Paint! Although server rendering provides a faster First Contentful Paint, it doesn't always provide a faster Time To Interactive. The necessary Ja…