A question about self-signed cert used in https case

[royling]

If a self-signed cert is used in the target server, the browsers require user's override to handle the requests. In Chrome, it gives NET::ERR_CERT_AUTHORITY_INVALID first.

In this case, this lib (for browser) would not work. Right?
I think it would be good to note this in the doc, I can submit a PR if acceptable.

[sindresorhus]

I don't really see why that needs to be documented here. It's just basic XHR/fetch behavior. It's not specific to this module.