Edge's 'fetch' without a body in the response (204) not handled

[MariusGrandeAndersen]

Our server has certain requests giving 204 No Content as a response to a fetch request.

On Chrome, the response object in response.js has a body that is ReadableStream (it is empty though) and bodyUsed = true.

On Microsoft Edge, the response object in response.js has a body = null and bodyUsed = false.

In the source code of response.js if mode === fetch then it expects a body, but this is not the case in Microsoft Edge.

Can you please add a "if response.body === null" style guard on the fetch response logic?

[SaschaAusUlm]

We are hitting the same issue.

var reader = response.body.getReader()

runs into an error on Edge because the reponse has no body.

[charlesfries]

I submitted a PR that fixes the issue: #110