How do I troubleshoot issues after upgrading Node.js?

I just upgraded Node.js to the latest version, but now my application won't start. What should I do?

First, check the error messages in your terminal. They can provide clues about what's going wrong.

I see an error about a missing module. How can I fix that?

You might need to reinstall your dependencies. Try running npm install to see if that resolves the issue.

I did that, but now I have a different error related to a deprecated function.

In that case, you may need to update your code to use the new function or method as per the latest Node.js documentation.

Thanks! How can I find out which functions are deprecated?

You can check the Node.js release notes for the version you upgraded to. They usually list deprecated features and alternatives.