What is CORS and how do I implement it?

What is CORS and how do I implement it?

CORS stands for Cross-Origin Resource Sharing. It's a security feature that allows or restricts resources requested from another domain. To implement CORS, you need to set specific HTTP headers on your server.

What headers do I need to set for CORS?

You typically need to set the 'Access-Control-Allow-Origin' header to specify which domains are allowed to access your resources. You may also need 'Access-Control-Allow-Methods' and 'Access-Control-Allow-Headers'.

Can I allow all domains with CORS?

Yes, you can set 'Access-Control-Allow-Origin' to '*' to allow all domains, but be cautious as this can expose your API to security risks.

How do I test if CORS is working?

You can test CORS by making a request from a different origin using tools like Postman or by creating a simple HTML page that makes a fetch request.