How does CORS work with the Fetch API?

Can you explain how CORS works with the Fetch API?

CORS, or Cross-Origin Resource Sharing, is a security feature that allows or restricts resources requested from another domain. When using the Fetch API, if you try to fetch a resource from a different origin, the browser checks the CORS headers to determine if the request is allowed.

What headers should I include in my request?

You typically need to include the 'Origin' header in your request. The server should respond with the 'Access-Control-Allow-Origin' header to specify which origins are permitted to access the resource.

What if the server doesn't support CORS?

If the server doesn't support CORS, your request will be blocked by the browser, and you'll see a CORS error in the console. You may need to configure the server to allow CORS.

Can I bypass CORS restrictions?

Bypassing CORS restrictions is not recommended as it can lead to security vulnerabilities. It's best to configure the server properly to allow the necessary requests.