function LightStar(num){
this.num=num;
this.init()
}
LightStar.prototype={
init:function(){
this.lightOn();
this.bindEvent()
},
bindEvent:function(){
var that=this;
$("#a").on('mouseover','li',function(){
//这里的方法为什么不行呢???要在上面怎么修改才能调用的到呢
that.lightOn($(this).index()+1);
//控制台输出的为underfined
console.log(that.lightOn(2))
}).on('mouseout','li',function(){
that.lightOn(num);
}).on('click','li',function(){
that.num=$(this).index()+1
})
},
lightOn:function(num){
var that=this;
$("#a li").each(function(i,item){
if(i<that.num){
$(this).css('background-position','0 -32px')
}else{
$(this).css('background-position','0 0')
}
});
},
};
new LightStar(2)
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