What if we can assign an action (callback) for each of the 'eat' event ? this way switch/case would be eliminated.

b

var fsm = StateMachine.create({
    initial: 'hungry',
 
    events: [
	    { name: 'eat',  from: 'hungry',                                to: 'satisfied', action: 'foo' },
	    { name: 'eat',  from: 'satisfied',                             to: 'full', action: 'bar'      },
	    { name: 'eat',  from: 'full',                                  to: 'sick', action: 'coo'      },
	    { name: 'rest', from: ['hungry', 'satisfied', 'full', 'sick'], to: 'hungry', action: 'doo'    },
	]});

//action
fsm.foo = function( evt, from, to ){
  //
}

fsm.bar = function( evt, from, to ){
  //
}

fsm.coo = function( evt, from, to ){
  //
}

fsm.doo = function( evt, from, to ){
  //
}