Why do you believe the github style guide to be the authoritative source for JavaScript style? There is no benefit for avoiding use of semicolons other than not writing semicolons, whereas there are several detriments for their omission.
> It gives Twitter, or whatever other start up, an opportunity to replace an outdated piece of software by a nut case!
I don't know where this ad-hominem is coming from, but Douglas Crockford is hardly a nutcase.
> It gives Twitter, or whatever other start up, an opportunity to replace an outdated piece of software by a nut case!
I don't know where this ad-hominem is coming from, but Douglas Crockford is hardly a nutcase.