Fetch API & Handling JSON Responses

To create a backup of the response
To allow reading the response multiple times
Response.clone() is important because: 1) Response body can only be read once, 2) Creates a copy that can be read independently, 3) Essential when response needs to be processed multiple ways, 4) Commonly used with service workers and caching, 5) Preserves original response integrity, 6) Prevents 'already read' errors.
To copy response headers
To cache the response