Note this is the release repo, only each release is pushed here. The development repo is https://github.com/jgraph/mxgraph2, submit PRs there.
The PHP model was deprecated after release 4.0.3 and the archive can be found here.
If you want to build something like draw.io, GraphEditor is the best example to use as a base.
The npm build is here
mxGraph supports IE 11, Chrome 43+, Firefox 45+, Safari 10 and later, Opera 30+, Native Android browser 5.1.x+, the default browser in the current and previous major iOS versions (e.g. 13.x and 12.x) and Edge 31+.
The mxGraph library uses no third-party software, it requires no plugins and can be integrated in virtually any framework (it's vanilla JS).
You may post on the issues tracker on this Github project, but we expect a similar degree of input from you as Stack Overflow expects. i.e. "Please help me debug this", not "Write/Research/Architect this for me".
mxGraph is licensed under the Apache 2.0 license. We do not sell any other license, nor do we have an option for paid support.
We created mxGraph in 2005 as a commercial project and it ran through to 2016 that way. Our USP was the support for non-SVG browsers, when that advantage expired we moved onto commercial activity around draw.io. mxGraph is pretty much feature complete, production tested in many large enterprises and stable for many years. We actively fix bugs and add features since it comprises the base of our draw.io stack.