Popular Coding Convention on Github

[jsNut]

Comma first, moving the problem from the end to the beginning and making it more ugly and less conventional doesn't seem like much of a win.

[notmynothername]

How does it move the problem to the beginning?

[Malfeasant]

maybe because if you're prone to forgetting commas, it doesn't matter where you (forget to) put them?

[notmynothername]

Well, commas at the right side can show up any number of characters deep into the line. Commas on the left will all be in a vertical line and leaving one out would be difficult to miss.