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# GJS: Javascript Bindings for GNOME
The current stable series is built on Mozilla's SpiderMonkey 78 featuring **ECMAScript 2019** and GObjectIntrospection making most of the **GNOME API library** available.
To find out when a language feature was implemented in GJS, review [NEWS][gjs-news] in the GitLab repository. In many cases older versions of GJS can be supported using [polyfills][mdn-polyfills] and [legacy-style GJS classes](Modules.md#lang).
GJS includes some built-in modules like Cairo and Gettext, as well as helpers for some core APIs like DBus and GVariants. See the [Modules](Modules.md) page for an overview of the built-in modules and their usage.
[gjs-news]: https://gitlab.gnome.org/GNOME/gjs/raw/master/NEWS
[mdn-polyfills]: https://developer.mozilla.org/docs/Glossary/Polyfill
## GNOME API Documentation
There is now official [GNOME API Documentation][gjs-docs] for GJS, including everything from GLib and Gtk to Soup and WebKit2.
The [Mapping](Mapping.md) page has an overview of GNOME API usage in GJS such as subclassing, constants and flags, functions with multiple return values, and more.
There are also a growing number of [examples][gjs-examples] and thorough tests of language features in the [test suite][gjs-tests].
[gjs-docs]: https://gjs-docs.gnome.org/
[gjs-examples]: https://gitlab.gnome.org/GNOME/gjs/tree/master/examples
[gjs-tests]: https://gitlab.gnome.org/GNOME/gjs/blob/master/installed-tests/js
## Standalone Applications
It's possible to write standalone applications with GJS for the GNOME Desktop, and infrastructure for Gettext, GSettings and GResources via the `package` import. There is a package specification, template repository available and plans for an in depth tutorial.
* [GJS Package Specification](https://wiki.gnome.org/Projects/Gjs/Package/Specification.md)
* [GJS Package Template](https://github.com/gcampax/gtk-js-app)
GNOME Applications written in GJS:
* [GNOME Characters](https://gitlab.gnome.org/GNOME/gnome-characters)
* [GNOME Documents](https://gitlab.gnome.org/GNOME/gnome-documents)
* [GNOME Maps](https://gitlab.gnome.org/GNOME/gnome-maps)
* [GNOME Sound Recorder](https://gitlab.gnome.org/GNOME/gnome-sound-recorder)
* [GNOME Weather](https://gitlab.gnome.org/GNOME/gnome-weather)
* [GNOME Books](https://gitlab.gnome.org/GNOME/gnome-books)
* [Polari](https://gitlab.gnome.org/GNOME/polari) IRC Client
Third party applications written in GJS:
* [Tangram](https://github.com/sonnyp/Tangram)
* [Quick Lookup](https://github.com/johnfactotum/quick-lookup)
* [Foliate](https://github.com/johnfactotum/foliate)
* [Marker](https://github.com/fabiocolacio/Marker)
* [Gnomit](https://github.com/small-tech/gnomit)
* [Clapper](https://github.com/Rafostar/clapper/)
* [Flatseal](https://github.com/tchx84/Flatseal)
## Getting Help
* Mailing List: http://mail.gnome.org/mailman/listinfo/javascript-list
* IRC: irc://irc.gnome.org/#javascript
* Issue/Bug Tracker: https://gitlab.gnome.org/GNOME/gjs/issues
* StackOverflow: https://stackoverflow.com/questions/tagged/gjs
## External Links
* [GObjectIntrospection](https://wiki.gnome.org/action/show/Projects/GObjectIntrospection)
* [GNOME Developer Platform Demo](https://developer.gnome.org/gnome-devel-demos/stable/js.html) (Some older examples that still might be informative)
* [Writing GNOME Shell Extensions](https://wiki.gnome.org/Projects/GNOMEShell/Extensions/Writing)
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