ES2016+ - alexanderteplov/computer-science GitHub Wiki

ECMAScript 2016+ Features

ES2016

  1. Exponentiation (**)
  2. Array.prototype.includes

ES2017

  • Object.entries
  • Object.values
  • async/await
  • JavaScript shared memory: SharedArrayBuffer, Atomics object
  • padEnd, padStart (padding strings)
  • trailing comma in function parameters

ES2018

  • for-await-of (asynchronous iteration)
  • Promise.prototype.finally
  • object rest properties
  • object spread
  • RegExp features (s dotAll flag, named groups, negative look behind, Unicode)

ES2019

  • Array.prototype.flat
  • Array.prototype.flatMap
  • Object.fromEntries

ES2020

  • BigInt
  • nullish coalescing operator
  • optional chaining
  • globalThis object

ES2021

  • replaceAll
  • Promise.any
  • logical assignment operators (??=, &&=, ||=)
  • WeakRef
  • FinalizationRegistry
  • separators for numeric literals (1_000)
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