html 下拉列表datalist

-------------html--------
<input  id="lists" list="cars" />
<datalist id="cars">
    <option data-id="lab1" label="a" value="BMW">
    <option data-id="lab2" label="b" value="Ford">
    <option data-id="lab3" label="c" value="Volvo">
</datalist>

-------------jQuery--------

 var dom= $("#lists");
//设置
 dom.val('ddd')
//获取
 console.log(dom.val())