Vercel Deployment Failing Despite Successful Local Build – Need Help Identifying the Issue

[pawlean (Pauline P. Narvas)]

Hi, @datehubin! Welcome to the Vercel Community

Thanks for sharing so much details on your error - helps us a lot! Let me try and help here.

The error “ReferenceError: document is not defined” typically occurs when you’re trying to access the document object during server-side rendering or static generation. This is because the document object is only available in the browser environment, not on the server.

To fix this, you need to ensure that any code accessing document or other browser-specific APIs is only executed on the client-side. You can do this by:

• Using dynamic imports with next/dynamic for components that use document.
• Wrapping the code that uses document in a useEffect hook or checking if typeof window !== 'undefined' before executing it.

When it comes to having differing local and Vercel environments, I recommend checking out this community post with some ideas on how to debug.

Debugging Build Errors

When deploying your project on Vercel, you might encounter build errors that prevent your site from going live. Here are some ways to identify common issues and steps to resolve them. Analyzing the Build Log The first step in debugging is to carefully examine the build log. Look for these common issues: NPM Package Errors Update Required: If you see messages about outdated packages, try updating them in your package.json file. Legacy Peer Dependencies: For errors related to peer dependenci…

Remember, when deploying to Vercel, it’s crucial to ensure that your code is compatible with both client-side and server-side environments, especially when using Next.js with its server-side rendering capabilities.

Let us know how you get on!