6. NextJS, Gatsby, React - What are the differences? Differences between SPA, SSR, SSG

NextJS, Gatsby, and React differ in their approaches to page rendering. React is a library for building user interfaces, typically used for creating Single Page Applications (SPAs). NextJS supports Server-Side Rendering (SSR) and Static Site Generation (SSG), allowing for server-side rendering of pages and static site generation. Gatsby focuses on SSG, enabling the generation of static pages during the build process.