jsPlumb provides a means for a developer to visually connect elements on their web pages. It uses SVG or Canvas in modern browsers, and VML on IE 8 and below. The latest version is 1.5.5.

The project started out life on Google Code and was hosted there up until April 30, 2013. From May 1st, 2013, jsPlumb lives on GitHub only.

If you're new to jsPlumb, please do take the time to read the documentation. There are a few integration issues that you should be aware of: z-index needs special attention, for example.

At any time there is a built version in the dist directory, which contains the concatenated and minified files, as well as a full set of demos and tests, and there is a version under development in src. If taking something that is working and adapting it for your needs is what you want to do, use the files in the dist directory. If you need to work directly with the version in development - maybe there's a bug fix you need or whatever - you need the files in the src directory.

Note that the demos in the demos directory are always pointing at the current development version, and therefore have a long list of imports.

jsPlumb reluctantly uses GitHub's pedestrian issue tracker for enhancements and bugs. But please do check the Google Group before posting an issue, particularly if you're just asking a question.

• jQuery:

jsPlumb requires jQuery 1.3.x or later; it has been tested on 1.3.2, 1.4.x, 1.5.x, 1.6.x, 1.7.x, 1.8.x and 1.9.x. To support dragging, you will need jQueryUI 1.7.x or 1.8.x. NOTE: jQuery 1.8.x only works with jQueryUI 1.8.22 and above.

There is a bug in jQuery 1.6.x and 1.7.x's SVG support for IE9 - see this issue. It means that mouse events do not get posted. There is another discussion of the issue here. This issue is fixed in jQuery 1.8.

• MooTools:

jsPlumb requires MooTools 1.3.x or 1.2.4 (tested on 1.3.2 and 1.2.4; it might work on other versions). To support dragging in MooTools, you will need Drag.Move from MooTools More. jsPlumb has been tested with Drag.Move from MooTools More 1.3.2.1 and 1.2.4.4, but I would recommend using 1.3.2.1 as there were bugs on IE with the getPosition() function of MooTools, which the Drag.Move class uses.

Firefox 11 and MooTools 1.3.x do not play well together in SVG mode - see this issue

• YUI3:

jsPlumb requires YUI 3.3.x (tested on 3.3.0; it actually might work on other versions). You do not need to include anything other than 'node' in your code that works with jsPlumb, but due to the asynchronous nature of module loading with YUI, you need to ensure you use jsPlumb's ready function to wrap your initialisation code, or you cannot be sure that everything that is required is available:

jsPlumb.ready(function() { 
  ...
}); 

Links to various demonstrations can be found here.

TweetPlumb is a great Twitter visualisation built (I say it's great because I built it myself!) using jsPlumb.

Documentation can be found in the doc folder of the project, or you can view it online here.

API documentation is in the apidoc folder of the project, and online here.

The Bezier curve functions used by jsPlumb have been extracted to a separate project:

https://github.com/sporritt/jsBezier

...as have various simple geometry functions:

https://github.com/sporritt/jsplumb-geom

Tests can be found here

The Twitter account I use for this project is jsplumblib

..but of course things fall through the cracks with Twitter. So maybe use this instead:

Sign up for the jsPlumb announcements mailing list here.

All 1.x.x versions of jsPlumb are dual-licensed under both MIT and GPLv2.