In development mode (when you run
npm run devor
yarn dev), pages are pre-rendered on every request. This also applies to Static Generation to make it easier to develop. When going to production, Static Generation will happen once, at build time, and not on every request.
Importantly, Next.js lets you choose which pre-rendering form to use for each page. You can create a "hybrid" Next.js app by using Static Generation for most pages and using Server-side Rendering for others.
We recommend using Static Generation (with and without data) whenever possible because your page can be built once and served by CDN, which makes it much faster than having a server render the page on every request.
You can use Static Generation for many types of pages, including:
You should ask yourself: "Can I pre-render this page ahead of a user's request?" If the answer is yes, then you should choose Static Generation.
On the other hand, Static Generation is not a good idea if you cannot pre-render a page ahead of a user's request. Maybe your page shows frequently updated data, and the page content changes on every request.
Quick Review: When would you use Server-side rendering?