Selecting An Option Based On The Value Of Its Data Attribute

I want to choose (aka jQuery preselect) and set the value based on data variable. The list has 3 items having same values but differing data-d. Suppose I have variable selectvar='d

Solution 1:

Use below code and give id to your select.

$("#select2 option[data-id='" + selectvar + "']").prop("selected", true);

Solution 2:

Set the selected variable - then iterate over teh select list options and compare the data attribute - it the same - set selected property.

var selectvar = "d";


 $("#select2 option").each(function(){
     var id= $(this).attr('data-id');
    if(id === selectvar){ 
      $(this).prop('selected',true);
    }
 })
 

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select id="select2">
  <option data-id="mo" value="1">1</option>
  <option data-id="d" value="2" >one</option>
  <option data-id="h" value="3">o-ne</option>
</select>

Solution 3:

$("button").click(function() {
  var selectVal = $("input").val();
  
  $('[data-id="' + selectVal + '"]').prop("selected", true);
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select>
  <option data-id="mo" value="1" style="display: none;">1</option>
  <option data-id="d" value="1" style="">one</option>
  <option data-id="h" value="1">o-ne</option>
</select>
Data-id:<input/> <button>Change</button>