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ECMAScript ​

ES2025 ​

  • Set 메서드 (intersection / union / difference / ...)
  • Iterator helpers (map / filter / take / drop ...)
  • Import Attributes (with { type: "json" })
  • JSON Modules
  • Promise.try
  • RegExp.escape

ES2024 ​

  • Object.groupBy / Map.groupBy
  • Promise.withResolvers

ES2023 ​

  • Array.prototype.findLast
  • Array.prototype.findLastIndex
  • Array.prototype.toSorted
  • Array.prototype.toReversed
  • Array.prototype.toSpliced
  • Array.prototype.with

ES2022 ​

  • Class 필드 개선 (프라이빗 접근 제어자, 퍼블릭 필드 / 정적필드 선언 방식)
  • 최상위 레벨 await
  • Array.prototype.at
  • Object.hasOwn
  • Error Cause (new Error(msg, { cause }))

ES2021 ​

  • numeric separators
  • replaceAll
  • Logical assignment
  • Promise.any

ES2020 ​

  • BigInt
  • nullish coalescing
  • Promise.allSettled
  • optional chaining
  • globalThis
  • String.prototype.matchAll
  • 동적 import (import())
  • import.meta

ES2019 ​

  • Object.fromEntries
  • String trim
  • Array.prototype.flat
  • Array.prototype.flatMap
  • Optional catch binding

ES2018 ​

  • Object Rest/Spread
  • Promise finally
  • Async iteration
  • RegExp 명명 캡처 그룹 (?<name>...)
  • RegExp Lookbehind (?<=...)
  • RegExp s(dotAll) flag

ES2017 ​

  • async / await
  • Object.values
  • Object.entries
  • String Padding
  • Trailing commas in function parameter lists and calls

ES2016 ​

  • ** 연산자
  • Array.prototype.includes

ES6 ​

  • Let and Const
  • Template Literals
  • Arrow Functions
  • Promise
  • Default Parameters
  • Destructuring Assignment
  • Enhanced Object Literals
  • Class
  • Module
  • Spread / Rest (배열 · 함수 인자)
  • Generators (function* / yield)
  • Iterators / for...of
  • Map / Set / WeakMap / WeakSet
  • Symbol
  • Proxy / Reflect

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