In what cases is using server-side rendering (SSR) necessary?

The use of SSR is necessary in the following cases:

• SEO (Search Engine Optimization): Search engines better index pages with ready HTML obtained from the server. This is critical for content sites, blogs, online stores.

• Performance and User Experience (UX):

  • Fast First Contentful Paint (FCP): Users see content faster because the browser does not need to wait for JavaScript to load and execute to build the DOM.
  • Improved perception of speed: Especially important for users with slow internet connections or on low-end devices.

• Social networks and messengers: Link previews (Open Graph, Twitter Cards) are displayed correctly, as metadata is generated on the server along with HTML.

• Content that should be displayed before JavaScript execution: For example, for users with JavaScript disabled or in older browsers.

• Reducing load on the client device: Part of the rendering work is done on the server.

Examples of scenarios where SSR is beneficial:

• News portals
• Blogs
• Online stores
• Landing pages with important content for indexing
• Applications with a large volume of static content