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Hey Mastodon JS engineers, how about you take part in the 2019 State of JS survey? Make sure you enter Mastodon on the "How did you find out about this survey" question, then hopefully next year there will be more of us on here: https://survey.stateofjs.com/
Server run by the main developers of the project 
It is not focused on any particular niche interest - everyone is welcome as long as you follow our code of conduct!
Also: woah, I just found out about Array.prototype.flat!
[1, 2, [3, 4]].flat() === [1, 2, 3, 4]
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/flat