ECMAScript

ES2023

• Array.prototype.findLast,
• Array.prototype.findLastIndex
• Array.prototype.toSorted
• Array.prototype.toReversed
• Array.prototype.toSpliced
• Symbol Key for WeakMap

ES2022

• Class 필드 개선 (프라이빗 접근 제어자, 퍼블릭 필드 / 정적필드 선언 방식)
• 최상위 레벨 await
• Array.prototype.at
• Regex flag d

ES2021

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

ES2020

• BigInt
• nullish coalescing
• Promise.allSettled
• optional chaning
• globalThis

ES2019

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

ES2018

• Object Rest/Spread
• Promise finally
• Async iteration

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