/*!* 事件流程管理* version: 1.0.0-2018.07.25* Requires ES6* Copyright (c) 2018 Tiac* http://www.cnblogs.com/tujia/p/9369027.html
*/class EventFlow
{static init(){this.objs         = [];this.events       = {};this.currentEvent = '';this.currentExp   = '';}static add(selector){this.objs.push( document.querySelectorAll(selector) );return this;}static on(evt){this.events[evt]  = [];this.currentEvent = evt;return this;}static when(exp){this.currentExp = exp;return this;}static then(func){this.events[this.currentEvent].push({'exp': this.currentExp,'func': func.toString().replace(/[^\{]+\{([\s\S]+)\}$/, '$1')});this.currentExp = '';return this;}static run(){if(this.objs.length>0){let i = 0;for(let evt in this.events){let commands = '';let events   = this.events[evt];for(let i in events){if(events[i]['exp']!=''){commands += `if(${events[i]['exp']}){${events[i]['func']}}`;}else{commands += events[i]['func'];}}this.objs[i].forEach((item, i)=>{item.addEventListener(evt, function(){eval(commands);});});i++;}}this.init();}
}export default EventFlow;

import EventFlow from './EventFlow.helper.js';EventFlow.init();EventFlow.add('.sel-type').on('change')
.when('this.value==1').then(function(){// code
})
.when('this.value==2').then(function(){// code
})
.when('this.value==3').then(function(){// code
})
.when('this.value==4').then(function(){// code
});EventFlow.add('.inp-name').on('input')
.then(function(){// code
});EventFlow.add('.inp-name').on('blur')
.then(function(){// code
});EventFlow.run();