I am using the following endless loop in a go routine:

for {		
	select {
	case a := channelA:
		doSomething(a)
	case b := channelB:
		doSomething(b)
	case channelC <- 1:
	}
	doSomethingD()
}

I suspect that sending values to channelA or channelB is guaranteed to be non-blocking, as long as all the doSomethingX functions contain no blocking code. By non-blocking I mean that channel sends from JS callbacks are guaranteed to succeed.

Is my assumption correct? I couldn't find any documentation that goes into enough detail to answer this. If it isn't correct, I think there would be value in implementing such a guarantee.