Update: This series of blog post has been turned into the book “Setting up ES6” (which is free to read online).
Babel 6 is much more configurable than Babel 5, but also more difficult to configure. This blog post gives tips.
The following ECMAScript proposal is at stage 3: “Trailing commas in function parameter lists and calls” by Jeff Morrison. This blog post explains it.
This blog post examines three ways of executing function sequentially: