ECMAScript standard
ECMAScript is a scripting programming language, standardized by Ecma International in the ECMA-262 specification.
Versions
| Edition | Date published | Differences to the previous edition |
|---|---|---|
| 1 | June 1997 | First edition, editor Guy L. Steele, Jr. |
| 2 | June 1998 | Editorial changes to keep the specification fully aligned with ISO/IEC 16262 international standard; editor Mike Cowlishaw. |
| 3 | December 1999 | Added regular expressions, better string handling, new control statements, try/catch exception handling, tighter definition of errors, formatting for numeric output and other enhancements; editor Mike Cowlishaw. |
| 4 | Abandoned | Rejected for proposing too much new syntax and too many extra features. |
| 5 | December 2009 | Added JSON library, use strict mode, property accessors, immutable objects, additional reflection facilities, and more.
|
| 5.1 | June 2011 | Corrected errors in the specification. |