You can read it everywhere,
es6, ... but what is this exactly? To fully understand what is behind the "ES" script names it is necessary to first know ECMA-262.
ECMA-262 is the specification (or technical standard) of ECMAScript. This specification is a technical documentation which specifies what kind of requirements ECMAScript needs to satisfy.
It is standardized by Ecma International which is a Swiss non-profit organization based in Geneva. They are responsible for a lot of standards, including JSON, C#,... (ECMA-262 by Ecma international)
ECMAScript is the standard, specified by ECMA-262. The purpose is to make websites, build with programming languages based on it, function in the same way in all browsers. (ECMAScript, Wikipedia)
- ECMAScript, Wikipedia - Read on 17/02/2021
- Specification (technical standard), Wikipedia - Read on 17/02/2021
- ECMA-262 by Ecma international - Read on 17/02/2021