ES2021 Features

And this is why we have so many languages. Language starts not so good, very limited, then features are added that makes it really popular, more and more features are added till it reaches the point where it no longer resembles the original that made it popular, mature codebases have multiple different styles, you look at the piece of code and think wtf is this supposed to do? People are fed up and start new language with limited set of features.

MDN has a bit more info on the new FinalizationRegistry API. Has anyone ideas about good use cases for this?

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refe...

They are seemingly small upgrades, but the logical assignment operators and visual separation of numbers are really nice to have - two things I definitely miss from Ruby.

x += y; x = x + y; x = y; x = x y; x ||= y; x || (x = y); // Why? // Why not x ||= y; x = x || y;?

let fee = 123_00; // $123 (12300 cents, apparently) // Why not 12300? let amount = 123_4500; // 123.45 (4-fixed financial) // Why not 1234500? // Why not just ignore those underscore and let Indians type like 3_00_00_000 // or Japaneses type like 1234_0000

These articles always seem to pop up everytime there's a JS language update - and they're all just copy-pasted content from MDN.