KJS (software)

Original author(s) Harri Porten
Developer(s) KDE
Initial release 2000 (2000)
Stable release 5.29.0 (December 12, 2016 (2016-12-12)) [±][1]
Preview release 5.0 beta 3 (June 5, 2014 (2014-06-05)) [±][2]
Written in C++
Type JavaScript engine
Website JavaScript (ECMAScript)
Main article: KDE Frameworks

KJS is KDE's ECMAScript-JavaScript engine that was originally developed for the KDE project's Konqueror web browser by Harri Porten in 2000.

On June 13, 2002, Maciej Stachowiak announced on a mailing list that Apple was releasing JavaScriptCore, a framework for Mac OS X that was based on KJS.[3] Through the WebKit project, JavaScriptCore has since evolved into SquirrelFish Extreme, a JavaScript engine that compiles JavaScript into native machine code.


  1. KDE (2016-12-12). "Release of KDE Frameworks 5.29.0". Retrieved 2016-12-13.
  2. "KDE Ships Third Beta of Frameworks 5". KDE. 2014-06-05.
  3. Stachowiak, Maciej (2002-06-13). "[KDE-Darwin] JavaScriptCore, Apple's JavaScript framework based on KJS". opendarwin.org. Archived from the original on 2007-03-10. Retrieved 2015-05-13.
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