ISO/IEC 16262:2011 Preview
Information technology -- Programming languages, their environments and system software interfaces -- ECMAScript language specification
This standard was last reviewed and confirmed* in 2016.
*Therefore this version remains current
The electronic version of this International Standard can be downloaded from the ISO/IEC Information Technology Task Force (ITTF) web site
ISO/IEC 16262:2011 defines the ECMAScript scripting language.