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Este capítulo contiene información del historial de versiones de JavaScript y su estatus de implementación en aplicaciones basadas en JavaScript de Mozilla/SpiderMonkey (como Firefox)
Versiones ECMAScript
- Recursos del Lenguaje
- Aprende más acerca de los estándares ECMAscript en los que el lenguaje JavaScript está basado.
- Soporte ECMAScript 5
- Estatus de la implementación del estandar actual ECMA-262 (Edición 5.1) en aquellos productos y sistemas basados en Mozilla.
- Soporte ECMAScript 6
- Estatus de la implementación del estandar en proceso de incorporación ECMA-262 (Edición 6) en aquellos productos y sistemas basados en Mozilla.
- Soporte ECMAScript 7
- Estatus de la implementación del estandar próximo ECMA-262 (Edición 7) en aquellos productos y sistemas basados en Mozilla.
Notas de Lanzamiento de JavaScript
- Bitácora de cambios (changelog) de JavaScript en Firefox
- Vea esta bitácora de cambios (changelog) para mayor información de las características y funcionalidades implementadas a partir de Firefox 5.
- Bitácora de Cambios (Changelog) de JavaScript en Chrome
- (PENDIENTE) Vea esta bitácora de cambios (changelog) para mayor información de las características y funcionalidades implementadas en Chrome.
Versiones JavaScript
Deprecated ( ). The explicit versioning and opt-in of language features was Mozilla-specific and is in process of being removed. Firefox 4 was the last version which referred to an JavaScript version (1.8.5). With new ECMA standards, JavaScript language features are now often mentioned with their initial definition in ECMA-262 Editions such as Edition 6 (ES6).
JavaScript was released as version 1.0 in March 1996 in Netscape Navigator 2.0 and Internet Explorer 2.0.
- JavaScript 1.1
- Version shipped in Netscape Navigator 3.0. Released on August 19, 1996.
- JavaScript 1.2
- Version shipped in Netscape Navigator 4.0-4.05. Released on June 11, 1997.
- JavaScript 1.3
- Version shipped in Netscape Navigator 4.06-4.7x. Released on October 19, 1998.
Standardization work to be compliant with ECMA-262 1st and 2nd Edition. - JavaScript 1.4
- Version shipped in Netscape's server side JavaScript. Released in 1999.
- JavaScript 1.5
- Version shipped in Netscape Navigator 6.0 and Firefox 1.0. Release on November 14, 2000.
Standardization work to be compliant with ECMA-262 3rd Edition. - JavaScript 1.6
- Version shipped in Firefox 1.5. Released in November 2005.
Includes ECMAScript for XML (E4X), newArray
methods plusString
andArray
generics. - JavaScript 1.7
- Version shipped in Firefox 2. Released in October 2006.
Includes generators, iterators, array comprehensions,let
expressions, and destructuring assignment. - JavaScript 1.8
- Version shipped in Firefox 3. Released in June 2008.
Includes expression closures, generator expressions andArray.reduce()
- JavaScript 1.8.1
- Version shipped in Firefox 3.5. Released on June 30, 2009.
Includes the TraceMonkey JIT and supports native JSON. - JavaScript 1.8.2
- Version shipped in Firefox 3.6. Released June 22, 2009.
Includes only minor changes. - JavaScript 1.8.5
- Version shipped in Firefox 4. Released July 27, 2010.
Includes many new features for ECMA-262 Edition 5 compliance.
This is the last JavaScript version.
Features still requiring version opt-in
let
statement- The
let
statement requires the JavaScript version 1.7 (or higher) opt-in. See error 932517 and error 932517.