Sample Code:

varSimpleStateMachine=Squirrel.StateMachine.extend({// state machine definitionmachine :{states :{A :{onEntry:"enterA",onExit:"exitA",initial:true},B :{onEntry:"enterB",onExit:"exitB"},F :{onEntry:function(){this.callSequence+=".enterF";},onExit:function(){this.callSequence+=".exitF";},final:true}},transitions :[{from :"A",to :"B",on :"A2B",perform :"fromAToB"},{from :"B",to :"A",on :"B2A",perform :functionfromBToA(){this.callSequence+=".fromBToA";}},{from :"B",to :"C",on :"B2C",perform :functionfromCToD(){this.fire("C2D");this.fire("D2E");}},{from :"C",to :"D",on :"C2D"},{from :"D",to :"E",on :"D2E"},{from :"D",to :"F",on :"D2F",when :functionmoreThanTen(context){returncontext>10;}},{from :"A",to :"F",on :"END"}]},// state machine initialize functioninitialize :function(){this.callSequence="";},// state machine actionsenterA :function(){this.callSequence+=".enterA";},methodMissing :function(methodName){this.callSequence+="."+methodName;}});varSimpleStateMachineEx=SimpleStateMachine.extend({machine :{initial :"B",states :{A :{onEntry:"enterAFromEx:0"},// invoked after original entry methodB :{onExit:"exitBFromEx:0"}// invoked after original entry method}},enterAFromEx :function(){this.callSequence+=".enterAFromEx";},exitBFromEx :function(){this.callSequence+=".exitBFromEx";}});varsimpleStateMachineExInstance=newSimpleStateMachineEx(null/*use default*/,{isDebugInfoEnabled:true});simpleStateMachineExInstance.start();console.log("Current State: "+simpleStateMachineExInstance.getCurrentState());simpleStateMachineExInstance.fire("B2A");console.log("Call sequences: "+simpleStateMachineExInstance.callSequence);