isServer

isServer is a utility function that checks if the code is running on the server. It returns true in SSR (Server-Side Rendering) environments where window is undefined, and false in client-side environments.

Interface

function isServer(): boolean;

Parameters

This function does not accept any parameters.

Return Value

• boolean
  

  true if running in a server environment (SSR), false otherwise.

Example

if (isServer()) {
  // SSR-safe code
  return null;
}

// Client-only code
window.addEventListener('resize', handleResize);