It’s official! We’re getting a new function syntax! The TC39 group (the panel charged with delivering ES 6) has reached a consensus on an abbreviated syntax for JavaScript function expressions. It’s popularly known as the fat arrow syntax, and is based on a similar construct found in CoffeeScript.

Make no mistake, I’m delighted that we will finally have an alternative to the unnecessary clunkiness and verbosity of the present grammar, but I can’t shake a nagging feeling that this proposal (in its current form) is flawed to the extent that it might actually make new developers more confused than they already were. I’ll run through the key features of this new construct, then explain my concerns and how they might be mitigated.

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