18. State mode

var States = { state0 : function(){ console.log(0) }, state1 : function() { console.log(1) }, state2 : function() { console.log(2) }, state3 : function() { console.log(3) } } var ResultState = (function() { function show(result) { States['state' + result] && States['state' + result]() } return { show : Function changeAction(action) {if (action == 'jump') {// if (action == 'jump') {//  jump } else if (action == 'move') { // move } else { // other } lastAction = action } var MarryState = function() { var  _currnetState = {}, state = { jump: function() { console.log('jump') }, move: function() { console.log('move') }, shoot: function() { console.log('shoot') }, squat: function() { console.log('squat') } } var changeState = function () { var arg = arguments _currnetState = {} if(arg.length) { for (let index = 0; index < arg.length; index++) { const element = arg[index]; _currnetState[arg[index]] = true } } return this } var goes = function () { // console.log('one goes') for (const i in _currnetState) { // console.log(i,_currnetState, _currnetState[i]) state[i] && state[i](); } return this } return { change: changeState, goes: goes } } MarryState().change('jump','shoot').goes().goes() var marry = new MarryState() // marry.change('jump','shoot').goes().goes()Copy the code