Apache Flex

Thursday April 24, 2014

Apache FlexJS 0.0.1 and Apache Flex FalconJX 0.0.1 Released

The Apache Flex community is pleased to announce the initial (alpha) release of Apache FlexJS SDK 0.0.1 and Apache Flex FalconJX Compiler 0.0.1.

Apache Flex is a highly productive, open source application framework for building and maintaining expressive applications that deploy consistently on all major browsers, desktops and devices (including smartphones,
tablets and tv).

Apache FlexJS is a next-generation Flex SDK that enables developers to use MXML and ActionScript to not only create SWFs but also cross-compile the same MXML and ActionScript to HTML/JS/CSS so applications can run natively in browsers. The cross-compiled code can also be used in Apache Cordova (Adobe PhoneGap) mobile applications.

Apache Flex FalconJX is a next-generation MXML and ActionScript cross-compiler. It extends the next-generation SWF compiler known as Falcon. Both are contained in the release package and are used by the FlexJS package to compile SWFs or cross-compile to HTML/JS/CSS.

This is the initial release of FlexJS and FalconJX. It is 'alpha' quality. The purpose of this release is to gather feedback about the features and implementation strategies, and recruit new contributors as we grow these code bases into an SDK and tool chain that delivers the highest productivity developing applications that can run in the most places. These releases may not handle production needs. Expect lots of bugs and missing features. Please file bugs at:


For questions about how to use FlexJS and FalconJX, send email to users@flex.apache.org. Please try to prefix the subject with [FlexJS] or [FalconJX] so it is clear the questions refer to this release and not the Flex SDK and MXMLC compiler.

For questions and feedback on the development of the source code in these releases, send email to dev@flex.apache.org. Again, please prefix the subject with [FlexJS] or [FalconJX].

Apache FlexJS and Apache Flex FalconJX are available in source and binary form from the following download page:


When downloading from a mirror site, please remember to verify the downloads using signatures or MD5 hashes.

A simple way to try these releases is to use a pre-release of the InstallApacheFlex 3.0 application which is available at the following url:


Choose Apache FlexJS 0.0.1 and it will create an Adobe Flash Builder-compatible SDK that uses the Falcon and FalconJX compilers to generate SWFs and HTML/JS/CSS output. See the README or the FlexJS wiki
for more information. The FlexJS section of the wiki is at the following url:


For more information on Apache Flex, visit the project home page:

Please try FlexJS and become involved in shaping the future of Flex.

-The Apache Flex Community


It is a great news for Flex-Java devs.. Congrats to all the Devs, those who has contributed huge amount of time to re-run Flex. Thanks once again. But from my point view, we need some tool who can easily integrate with oracle weblogic, create some BPM project, for Telecom and finance domains. Yes, it is existing in Oracle, like Metasolv etc. So we need to think that type of thing also for integration front end to db. and with Flexjs we can able to run that apps from any device. these are the + points for us. :) After all, congrats guys.. keep it up.. :) Thanks, Madhusudan

Posted by Madhusudan on April 28, 2014 at 10:05 AM GMT #

First of all my congratulations to the Flex Developers Team nice work guys! Question: I see, that the next generation of compiling a "MXML/AS3 Project" will be Falcon. The compiled output JS classes also can be used by "Apache Cordova/PhoneGap" to build native applications for mobile devices. PhoneGap has to be build with the Cordova/PhoneGap Build web service. Now I can package my own app, but in the future with Falcon, this can't be done by the end-user?

Posted by Frank on April 30, 2014 at 01:00 PM GMT #

Outstanding work by Apache.....For Alive Flex for mobile web broweser with FlexJS....... Kudos!!!!!!! to all Apache FlexJS Brains behind this innovative idea to convince the World that flex is return with big BANGGGGGGGG!!!!!!!! All the best and please continue with great efforts for FlexJS. with Regards, Sunill Rana

Posted by Sunil Rana on May 01, 2014 at 06:25 AM GMT #

Hi Apache, Thank you so much for release this JS version. This resolves major issue related to flash player issue. Ravichandran J Flex Developer

Posted by Ravichandran J on May 07, 2014 at 03:07 PM GMT #

I am not having any luck running the sample FlexJS project with FlashBuilder 4.6 premium. I am getting this exception "Errors occurred during the build. Errors running builder 'Flex' on project 'TestFlexJS'. flex2/tools/oem/OEMException$CircularLibraryDependencyException" Any ideas?

Posted by Rockster on May 13, 2014 at 11:36 PM GMT #

Great work. We'll have a look at this. Hope to get examples and community feedback as to the performance of FlexJS.

Posted by Norman Curato on May 28, 2014 at 12:39 AM GMT #

the installer found at: https://dist.apache.org/repos/dist/dev/flex/installer/3.0/rc7/binaries/ when nightly build for flexjs is selected the installer stops progressing when it says "Finished unzipping: c:\folder path\apache-flex-flexjs-0.0.2-bin.zip" os: windows 8

Posted by pjshand on June 08, 2014 at 07:45 AM GMT #

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