Skip to content
Switch branches/tags

Latest commit


Git stats


Failed to load latest commit information.
Latest commit message
Commit time


... is an offline web application that aims to expedite (and take the pain out of) visual regression testing. Flux140 is a picture viewer that simplifies comparing whole runs of a UI test suite by showing thumbnails of screenshots at a given point in time / build number. These screenshots have to be created in advance. We use our continuous integration server (Jenkins) and Selenium for that. (Note to self: check out pageres for creating screenshots of responsive websites quickly.)

Created by IT:Agenten and published under the permissive MIT license. We of course welcome all contributions, be it bug reports or code. If you don't have an CI stack running and have some money to spare, IT:Agenten Gmbh is glad to help you out. Also, we are planning a ready-to-use SaaS offering.


Everybody loves them.

Thumbnail view Detail view

Shameless plug

Flux140 does not come with an easy install procedure unfortunately. If you are interested in an easy to use solution to record and analyse the progress of your web project and find regressions quickly, please register for the private Beta of Flux140 SaaS.

How to use

After checking out the repo, pull in dependencies using Bower: In the flux140/frontend directory, issue the command bower install.

Configure your CI stack (e.g. Jenkins, Selenium) to copy the generated screenshots to a directory like this:

├── tree.json
└── Firefox
    ├── form_new_item
    │   ├── 116.png
    │   ├── 117.png
    │   ├── 118.png
    │   └── [...]
    └── form_new_item_submitted
        ├── 116.png
        ├── 117.png
        └── [...]

The screenshot files get their names from the current build number. When using Jenkins the build number is made available to your test scripts in the BUILD_NUMBER environment variable.

You (or rather your CI stack) will have to create tree.json using the free tree tool (> 1.7.0) after adding new files:

tree -J -v > tree.json

NOTE: The -J option for JSON output has been added to tree version 1.7.0. Steve Baker has merged our code :) Should you experience any issues, try to use our version.

Shout-outs to our fellow open sorcerers

The application has been created using

... using Vim on Ubuntu. Thanks to all of you folks! Long live open source!


An offline web application that aims to expedite (and take the pain out of) visual regression testing.




No packages published