JavaScript Language Resources

Table of contents

  1. 1. Implementations
    1. 1.1. See also
Table of contents
  1. 1. Implementations
    1. 1.1. See also

ECMAScript is the scripting language that forms the basis of JavaScript. ECMAScript is standardized by the Ecma International standards organization in the ECMA-262 specification. The following ECMAScript standards have been approved:

Name Links Date Description
ECMA-262 PDF June 1997 the original ECMAScript standard.
ECMA-262 Edition 2 PDF August 1998 the second revision of the ECMAScript standard; also ISO standard 16262.
ECMA-262 Edition 3 PDF December 1999 the third revision of the ECMAScript standard; corresponds to JavaScript 1.5.
See also the errata
ECMA-262 Edition 5 PDF December 2009 ECMAScript 5
See also the ES5 errata and ECMAScript 5 support in Mozilla
ECMA-262 Edition 5.1 PDF June 2011 ECMAScript 5.1, the latest published revision of the standard.
This version is fully aligned with 3rd edition of the international standard ISO/IEC 16262:2011.
It includes ES5 errata fixes, no new features.
ECMA-357 PDF June 2004 ECMAScript for XML (E4X).
See also the E4X errata.

See wikipedia ECMAScript entry for more information on ECMAScript history.

You can participate in or just track the work on the next revision of the standard, code-named "Harmony", via public wiki and the es-discuss mailing list linked from ecmascript.org.

Implementations

See also

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