Frontend & browser·Rendering and the browser pipeline
you view source and there is nothing in the body but an empty div and a script tag.
Client-side rendering
Also calledCSR, SPA rendering
The page ships as a shell and JavaScript builds the entire interface in the browser. It gives you cheap navigation after the first load and one deployable that is just static files. The costs land on the first visit and on anything without a fast CPU: nothing is visible until the bundle has downloaded, parsed and executed, and crawlers or link previews may see the empty shell.