Answers for "select2 get selected data"

get select2 selected value

//initialize
$('#mySelect2').select2('data');
//get selected value
$('#mySelect2').find(':selected');

select2 multi select get selected value

alert("Selected value is: "+$(".leaderMultiSelctdropdown").select2("val"));

alternatively, if you used a regular selectbox as base, you should be able to
use the normal jquery call, too:

alert("Selected value is: "+$(".leaderMultiSelctdropdown").val());