I'm using the Fetch API both in the frontend and on the backend (NodeJS), a problem that I've been facing a lot happens when parsing the response as json.

response.json() will return a promise so I don't know beforehand what the body of the response is, and when the body is empty the JSON parsing will fail with the error:

SyntaxError: Unexpected end of input

So my question is, how to prevent parsing the response when its empty?

Thanks