如何通过vanialla JavaScript获取所选选项的数据属性?
我正在尝试使用vanilla JavaScript获取所选选项的数据属性如何通过vanialla JavaScript获取所选选项的数据属性?,javascript,select,dataset,Javascript,Select,Dataset,我正在尝试使用vanilla JavaScript获取所选选项的数据属性 <script type='text/javascript' src='https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js'></script> <select id="roomno" name="roomno"> <option value="1" data-daily-rate="50" d
<script type='text/javascript' src='https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js'></script>
<select id="roomno" name="roomno">
<option value="1" data-daily-rate="50" data-weekly-rate="300" data-monthly-rate="1200">1 - Single room</option>
<option value="2" data-daily-rate="100" data-weekly-rate="600" data-monthly-rate="2500">2 - Double Bedroom</option>
<option value="3" data-daily-rate="150" data-weekly-rate="850" data-monthly-rate="4000">3 - Deluxe</option>
</select>
<script>
document.addEventListener("DOMContentLoaded", () =>
{
$("#roomno").on("change", function() // Used jQuery only for this
{
calculateRate();
});
});
function calculateRate()
{
let roomno = document.getElementById("roomno");
let daily_rate = roomno.dataset['daily-rate'];
console.log(daily_rate);
}
</script>
1-单人房
双卧室
3-豪华
document.addEventListener(“DOMContentLoaded”,()=>
{
$(“#roomno”)。在(“change”上,function()//仅为此使用jQuery
{
计算();
});
});
函数calculateRate()
{
让roomno=document.getElementById(“roomno”);
让daily_rate=roomno.dataset['daily-rate'];
控制台日志(每日费率);
}
var roomno = e.options[e.selectedIndex];
roomno.dataset.dailyRate
// Or,
roomno.dataset['dailyRate']
此外,您还可以访问其他数据属性,如:
roomno.dataset.dailyRate
roomno.dataset.weeklyRate
roomno.dataset.monthlyRate
$(“#roomno”)。在(“更改”,function()
。您可以附加change
事件列表,如:
document.getElementById("roomno").addEventListener("change", calculateRate);
document.addEventListener(“DOMContentLoaded”,()=>{
文件。getElementById(“房间号”)。addEventListener(“更改”,计算);
});
函数calculateRate(){
设e=document.getElementById(“roomno”);
var roomno=e.options[e.selectedIndex];
让daily_rate=roomno.dataset.DailrRate;
控制台日志(每日费率);
}
--挑选--
1-单人房
双卧室
3-豪华