How do I troubleshoot CORS errors in my web application?

How do I troubleshoot CORS errors in my web application?

CORS errors usually occur when your web application tries to access resources from a different origin. What specific error message are you seeing?

I'm getting a 'No 'Access-Control-Allow-Origin' header is present on the requested resource' error.

This means the server you're trying to access isn't allowing your domain. You can fix this by configuring the server to include the appropriate CORS headers.

How do I add those headers on a Node.js server?

You can use the 'cors' middleware in your Express app. Just install it via npm and use it like this: app.use(cors());.

Thanks! What if I'm using a different server technology?

The approach varies by technology. Let me know which one you're using, and I can provide specific instructions.