Handling CORS in Different Environments

Serverless Functions

For serverless environments (e.g., AWS Lambda, Azure Functions), configure CORS directly in the function or API Gateway:

• AWS API Gateway: Configure CORS in the API Gateway console or via Infrastructure as Code (IaC) tools like AWS CloudFormation.
• Azure Functions: Configure CORS in the local.settings.json file or in the Azure portal under “Platform Features” > “CORS”.

Dockerized Environments

If your Node.js app runs in a Docker container, CORS configuration remains the same as in non-containerized setups. Ensure that the container’s networking allows for the expected interactions.