adminES6 vs ES5
ECMAScript 6? ES6 JavaScript 6 ? 2015 ? 6 ? ECMAScript 5? ES5ES6 ? JavaScript ? ES6 ? ES5 ?
ES5? var var hoisting undefined? var ?
ES6 let ? const ?
let? let let Temporal Dead Zone?TDZ?let JavaScript ?
const const ?const ?
?
ES5? var ? function ? window Node.js ? global
ES6? let?const ? class ?
?
ES6??
String startsWith?endsWith?includes ?
RegExp u?Unicode y
Number Number.isFinite?Number.isNaN?Number.isInteger
Array Array.from?Array.of?find?findIndex ?
Function
Object Object.assign?Object.is?Object.entries?Object.values ?
Symbol Symbol
Proxy ? Reflect?
? Uint8Array?Float32Array
Set ? Map
Iterator ? for...ofMap?Set
?
ES5 JavaScript ? ES5
ES6? ES6 ? Babel ? ES6 ? ES5 ES6 ?
ES6 ? ES5 ? JavaScript ES6 ?
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