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A JavaScript player of JClic activities.

npm version Bower version

JClic and JClic-repo

JClic is a free software project from the Catalan Educational Telematic Network (XTEC) for creating various types of interactive activities such as associations, puzzles, text activities, crosswords or puzzles, from elements of text, graphics and multimedia.

The program includes an authoring tool to create activities, a player and a reporting system that stores the results obtained by students. All these components, along with some guides and tutorials on how to create activities, are available in the clicZone.

JClic is a Java application that runs on Linux, Windows and Mac OS. Full source code and documentation are available on GitHub.

Many teachers from different countries have used JClic to create interactive materials for a wide variety of levels, subjects, languages and curriculum areas. Some of these materials have been collected in a huge library created with jclic-repo, another open source project that will facilitate the publication of collections of JClic projects in static web hosting services.

JClic project files

Groups of single activities are often grouped in JClic projects and organized in one or more sequences (lists of activities that must be performed in a specific order). The resulting set of activities, sequences and media elements are packaged into JClic project files (files with extension "").

JClic.js components

JClic.js makes use of:

The build brocess of JClic.js is based on:

  • npm (the package manager of Node.js) to build, install, update and track package dependencies
  • ESLint to check for errors and lint the source code
  • webpack to bundle all components together
  • Babel to make it also compatible with old versions of some browsers
  • UglifyJS to minimize the size of the final deliverable script
  • Live Server to test and debug
  • JSDoc and ink-bootstrap to build the API docs

How to set-up the development environtment

JClic.js uses Node.js modules encapsulated in npm packages. First of all, you must have Node.js (which includes 'npm') installed on your system.

To install the required packages, just go to the project's root directory and write:

npm install

This will install jQuery, webpack and other needed components into node_modules

To build jclic.js, just invoke:

npm run build

This will generate the file dist/jclic.min.js

To test this resulting bundle and see the demo on your browser, launch the test server:

npm start

You can also launch the program in "unbundled" mode, directly invoking the source scripts, useful for debug purposes:

npm run debug

You can also build this documentation running npm run build-doc

JClic.js main classes

JClic.js is organized in three main groups of classes: Player, Document and Utilities. In addition to this, the main JClic class provides methods to read JClic project documents, build players, launch activities and communicate with external reporting systems.



JClicPlayer loads JClic project files, manages the user interaction and acts as a interface between the browser and JClic classes for multiple functions. The player has:

  • Skin: manages the visual appareance. Can have up to three Counter objects.
  • PlayerHistory: used to track the user's navigation between activities.
  • Reporter: Used to collect and display scores, times and other data generated by users while playing activities.
    • TCPReporter: Special case of Reporter used to connect with external reporting systems like [JClic Reports] ( or the JClic module for Moodle.
    • SCORM: Utility functions to interact with SCORM 1.2 and 2004 when available
    • SessionStorageReporter: writes the report as a persistent data into the browser session or local storage.


Document classes

JClicProject encapsulates all data needed to play JClic activities. Its main components are:

The Activity class has the following subclasses:

All classes derived from TextActivityBase have:

At run time, all classes derived from Activity generate a specific Activity.Panel, that is a real DOM object with wich users interact.


Utility classes

AWT contains some classes similar to those defined in Java's Abstract Window Toolkit:

AbstractBox is a special class derived from AWT.Rectangle that has the following subclasses:

Box content:

  • ActiveBoxContent: encapsulates the content of a single ActiveBox.
  • BoxBase: contains style specs (color, gradient, border, font, size...) common to one or more ActiveBoxContent objects. Also used by TextActivityDocument to encapsulate text styles.
  • ActiveBagContent: a collection of ActiveBoxContent objects.
  • TextGridContent: encapsulates the content of a TextGrid object.




Jump between sequence points:

  • JumpInfo: stores information about what to do when an activity finishes or when the user clicks on a link or button.

Miscellaneous utility classes:

  • BoxConnector: Used to link two cells with a thin line dragged by the user.
  • Utils: Miscellaneous constants and functions.
  • i18n: Internationalization utilities.

Sponsors that make possible JClic.js

JClic is an open-source project supported by XTEC, the Telematic Network of the Catalan Ministry of Education

We use Transifex as a platform for translations of JClic.js into many languages. Please read if you want to contribute to the project creating a new translation or improving the existing ones.

Checking the operation of JClic.js on different browsers and platforms is possible thanks to BrowserStack

The production releases of JClic.js are smoothly distributed to the final users thanks to XTEC, JSDelivr, and CDNJS.

jclic.js is also available as a NPM and Bower packages.

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