JS: ECMAScript 2021

Number Separator

Numbers can have lowline _ between digits. For example, you can write 1_000.

• JS: Number

Logical Assignment Operators

• x &&= y
• x ||= y
• x ??= y
• JS: Logical Assignment Operators (??= ||= &&=)

String.prototype.replaceAll

easier way to do replace all.

• JS: String.prototype.replaceAll

before, you have to use String.prototype.replace with global flag on.

• JS: String.prototype.replace

Promise.any

Promise.any

• JS: Promise (class)

weak reference

Reference

• https://tc39.es/ecma262/2021/