(fp/no-nil) rule for callbacks?

[Dylanb-dev]

It is standard to write callbacks with error first so you end up with callback(null, "success message") or callback(err).

Is the solution to get around this to not use callbacks?

[graingert]

oh yes, you can't use callbacks because by their nature they're not pure

[Dylanb-dev]

Yeah just a lot of code has this convention and wanted the ruling on it.

I will try to use promises instead of callbacks.

[graingert]

I'd recommend using some effects library like Monet or IxJS then converting to a promise or continuation passing API at the last possible moment.

[graingert]

promises are also impure!

[Dylanb-dev]

Yeah I have separated side effects from my functions in my codebase but at the end it has a callback.