What is client-side rendering (CSR) and server-side rendering (SSR)? What is the main difference?

Client-side rendering (CSR) is when the HTML page loads with minimal content, and the main rendering and logic are executed on the client side (in the browser) using JavaScript. This allows creating interactive applications, but the initial load can be slower, and SEO is more challenging.

Server-side rendering (SSR) is when the HTML page is fully generated on the server and sent to the client already complete. This improves the speed of the first load and SEO, as search engines receive the full HTML.

The main difference is where the HTML is generated: on the client (CSR) or on the server (SSR).