Getting value of other attributes on datalist select

Question

I have a datalist:

<datalist id="subjects">
<?php foreach($subjects as $v){ ?>
        <option data-subjectid="<?php echo $v[2]; ?>" value="<?php echo ucwords($v[1]); ?>"><?php echo ucwords($v[1]); ?></option>
<?php } ?>
</datalist>

What I want to do is to get the value stored in the data-subjectid attribute of the value that is selected. What I have been doing up until now is to call the .each() function in jQuery like this:

//on Select Change
var selectedvalue = $(this).val();
$('#subjects option').each(function(){
   if(current_value == selectedvalue){
      //get the data-subjectid of current value   
   }
});

Is there a better and faster way to do this?

Answer 1

I'm not sure if this is faster (I'm not 100% sure how this selector works under the covers) but you can use the :selected selector to make the code a little cleaner.

var subjectId = $('#subjects option:selected').attr('data-subjectid');