ES5实现ES6中的class

用ES5实现ES6中的class；

function _defineProperties(target,prop){
        prop.forEach(ele => {		//可能会传入多个属性
            Object.defineProperty(target,ele.key,{
                value:ele.value,
                writable:true,
                configurable:true,
            })
        });//设置所设置的属性是否可写，可枚举
}

function _createClass(_constructor,_prototypeProperties,_staticProperties){						//这里传入的三个参数分别是构造函数，原型上的属性，静态属性
    if(_prototypeProperties){   //设置公有属性
        _defineProperties(_constructor.prototype,_prototypeProperties)
    }
    if(_staticProperties){  //设置静态属性
        _defineProperties(_constructor,_staticProperties)
    }
}

function _classCallCheck(_this,_constructor){
    if(!(_this instanceof _constructor)){     //判断是否是通过new(创建实例)来调用_constructor
            throw "TypeError: Class constructor AirPlane cannot be invoked without 'new'"
    }
}
var FatherPlane=(function(){
    function FatherPlane(name,color){
        _classCallCheck(this,FatherPlane)
        this.name=name||'liu';
        this.color=color||'red'
    }
    _createClass(FatherPlane,[
        {
            key:'fly',
            value:function(){
                console.log('fly')
            }
        }
    ],[
        {
           key:'static',
           value:function(){
               console.log('static')
           } 
        }
    ])
    return FatherPlane;
})()
var airplane=new FatherPlane()