Echo JS 0.11.0

I still find quite weird that languages have to adapt to *tools* and not vice versa.
Trailing commas still look like sloppy code to me.

Isn't a language itself also a tool though? We are problem solvers, computer languages, hardware, linters, npm, and all the rest are our tools.

If you mean that a language is a tool to program a computer so we're safe from using machine code directly, you may be right. But it's not what's commonly intended as a "development tool".
In the case of JavaScript, moreover, the language actually represents our final product, as the code is interpreted and compiled by the client on run-time.

No, I meant what I said - a computer language is one of the tools we use to solve a problem (building a website, making an app that keep track of your weight, whatever)

Currently implemented in Safari 10 and Edge 14. Congrats.