ECMAScript 6 (ES6, ES2015) Class, Object Literal Arrow Iterator, Generator, For of const, let destructuring, rest, spread Template string Symbol, Promise, Map, Set, WeakMap, WeakSet, Proxy, Reflect ECMAScript 7 ~ 10, Stage3 7 - 중첩된 rest해체 const 8 - async/await, shared memory, atomics 9 - object 해체, asynchronous iterators 10 - optional catch 11 - BigInt, globalThis, top level await, class field, ..