SCION is an industrial-strength implementation of W3C SCXML in JavaScript.

SCXML provides a declarative markup for Statecharts, a powerful modelling language for developing complex, timed, event-driven, state-based systems.

npm install scxml

Add the following script tags to your HTML:

<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-polyfill/6.23.0/polyfill.min.js">
<script src="https://cdnjs.cloudflare.com/ajax/libs/scion/4.3.1/scxml.min.js">

Then SCION API available as global singleton object scxml.

Install babel-polyfill and scxml with npm:

npm install --save scxml babel-polyfill

Then add to your application entry point:

require('babel-polyfill');
let scxml = require('scxml');

scxml.urlToModel("drag-and-drop.xml",function(err,model){

  if(err) throw err;

  model.prepare(function(err, fnModel) {

    if(err) throw err;

    //instantiate the interpreter
    var sc = new scxml.scion.Statechart(fnModel);

    //start the interpreter
    sc.start();

    //send the init event
    sc.gen({name:"init",data:rect});

  });
})

See the API docs here.

See the note here.

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To report a bug: file an issue on GitHub.

For general questions: