How to configure cross-origin resource sharing (CORS) in S3?

To configure Cross-Origin Resource Sharing (CORS) in Amazon S3, follow these steps:

Log in to the AWS Management Console and navigate to the S3 management console.
Click on the bucket for which you want to configure CORS.
Click on the "Permissions" tab and scroll down to find the "Cross-origin resource sharing (CORS)" section.
Click on the "Edit" button to start configuring CORS for the bucket.
Add a new CORS rule by clicking on the "Add CORS Configuration" button.
Specify the allowed origins, methods, headers, and expose headers in the CORS configuration. Here is an example of a basic CORS configuration:

[
    {
        "AllowedHeaders": [
            "*"
        ],
        "AllowedMethods": [
            "GET",
            "PUT",
            "POST",
            "DELETE"
        ],
        "AllowedOrigins": [
            "*"
        ],
        "ExposeHeaders": [
            "ETag"
        ]
    }
]

This example allows all origins to access the bucket using the specified methods and headers.

Click on the "Save" button to save the CORS configuration for the bucket.
Once the CORS configuration is saved, requests from the specified origins will be allowed to access the resources in the S3 bucket.

Note: Make sure to test your CORS configuration to ensure that it is working as expected before deploying it in a production environment.