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ECMAScript 2024 (ES15)

Major new features:

resizable ArrayBuffer, growable SharedArrayBuffer

ArrayBuffer.prototype.transfer(), .transferToFixedLength()

RegExp 'v' flag (set notation and properties of strings)

Promise.withResolvers()

Object.groupBy(), Map.groupBy()

Atomics.waitAsync()

str.isWellFormed(), str.toWellFormed()