What is server-side CORS and how does it work?

What is server-side CORS and how does it work?

Server-side CORS (Cross-Origin Resource Sharing) is a security feature that allows servers to specify who can access their resources. It works by sending specific HTTP headers that tell the browser whether to allow or deny requests from different origins.

Why is CORS important for web applications?

CORS is crucial because it helps prevent malicious websites from accessing sensitive data on another domain. It ensures that only trusted domains can interact with your server.

How can I implement CORS in my Node.js application?

You can implement CORS in a Node.js application using the 'cors' middleware. First, install it via npm, then require it in your app and use it as middleware.

Are there any security risks associated with CORS?

Yes, if not configured properly, CORS can expose your application to security risks, such as allowing unauthorized domains to access sensitive data. Always specify allowed origins carefully.