js版本规范的表示：ES6 == ES 6 == ECMAScript 6 == ECMA-262 6

Ecma 国际大会宣布正式批准ECMA-262第 6 版，亦即 ECMAScript 2015（曾用名：ECMAScript 6、ES6）的语言规范。

关系

ECMA-262 == ECMAScript

Ed表示

ES6 == ES 6 == ECMAScript 6 == ECMA-262 6

Ed.6

年号表示

ES6 == ECMAScript 2015

Written by Lee Boonstra

• JavaScript’s competing versions of the languages started emerging. So, JavaScript was eventually taken to ECMA International (Formed in 1961) so that an official standard for the language could be formed.
• Today, the standard versions of JavaScripts are referred as their version number as ECMAScript(ES5 or ES6). Also, it is being referred as their release year as ES2016 or ES2017.

https://edutechlearners.com/javascript-introduction-brief-history/