draw.io uses the [mxGraph library](https://github.com/jgraph/mxgraph) as the base of the stack, with the [GraphEditor example](https://github.com/jgraph/mxgraph/tree/master/javascript/examples/grapheditor) from mxGraph as the base of the application part. The mxGraph library build used is stored under /etc/mxgraph/mxClient.js.
draw.io is dual licensed under either the GPL v3 or the [mxGraph Commerical License](https://www.jgraph.com/Licenses/JGraph_Software_Licence.pdf). To use the commercial license, you must license from [JGraph](https://www.jgraph.com/purchase-mxgraph.html) for payment.
The [mxGraph documentation](https://jgraph.github.io/mxgraph/) provides a lot of the docs for the bottom part of the stack. There is an [mxgraph tag on SO](http://stackoverflow.com/questions/tagged/mxgraph).
The simplest way to run draw.io initially is to fork this project, [publish the master branch to Github pages](https://help.github.com/categories/github-pages-basics/) and the [pages sites](https://jgraph.github.io/draw.io/war/index.html) will have the full editor functionality (sans the integrations).
draw.io supports IE 9+, Chrome 30+, Firefox 31+, Safari versions actively patched by Apple (6.2.x, 7.1.x, 8.0.x and 9.x at time of writing), Opera 20+, Native Android browser 5.x+, the default browser in the current and previous major iOS versions (e.g. 9.x and 8.x) and Edge 20+.
