set value to TextBox if another option is selected in DropDown Box using JavaScript and jQuery code example

Example: how to set dropdown value in textbox using jquery

$('#chosen_a').change(function(){
     //get the selected option's data-id value using jquery `.data()`
      var criteria_rate =  $(':selected',this).data('id'); 
     //populate the rate.
    $('.criteria_rate').val(criteria_rate);
});