To handle CORS issues, configure your server to allow specific origins and include the necessary headers in your HTTP responses.

Cross-Origin Resource Sharing (CORS) issues often arise when your web app tries to access resources from a different origin, causing the browser to block the request for security reasons. To handle CORS issues effectively, start by configuring your server to allow specific origins. This is done by setting the Access-Control-Allow-Origin header in your HTTP responses. Specify the allowed origins by using the actual origin of your client application. For example, if your web app is hosted at https://example.com, your server should respond with Access-Control-Allow-Origin: https://example.com. If you want to allow multiple origins, you'll need to implement logic in your server code to dynamically set this header based on the request’s origin. Additionally, ensure that your server includes other necessary CORS headers, such as Access-Control-Allow-Methods, which specifies the HTTP methods allowed for the cross-origin request (e.g., GET, POST, PUT), and Access-Control-Allow-Headers, which indicates which headers can be included in the requests. If you're working with preflight requests, which are sent when making complex requests, make sure your server responds appropriately to OPTIONS requests. You can also consider using libraries or middleware (like cors for Express.js) that handle CORS configurations automatically. By properly configuring your server, you can resolve CORS issues and allow your web app to access the necessary resources without compromising security.