Next.js Window is Not Defined - 3 Production Ready Solutions

If you're a Next.js developer, you've likely encountered the frustrating "window is not defined" error. This common issue occurs during server-side rendering when trying to access browser-specific APIs like window or document. Don't worry – I'll share three practical solutions to resolve this problem.

Understanding the Window is Not Defined Error

The error typically happens because Next.js renders components on the server side, where global browser objects like window aren't available. This can break your application if not handled correctly.

3 Proven Solutions

• React Hooks with useEffect
• Custom Hook for Responsive Design
• Dynamic Imports Solution

1. Using React Hooks with useEffect

The most straightforward solution is to use the useEffect hook to ensure window-related code only runs on the client-side. This prevents server-side rendering issues and provides a clean way to handle browser-specific operations.

2. Custom Hook for Responsive Design

Create a custom hook that safely checks window dimensions and provides responsive functionality without causing rendering errors. This approach gives you more flexibility in handling client-side logic.

3. Dynamic Imports Solution

Leverage Next.js dynamic imports with server-side rendering disabled for components that heavily rely on window or browser APIs. This method ensures these components are only loaded on the client side.

Watch the full video tutorial here: Next.js Window is Not Defined Solutions

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