JAVASCRIPT

select2 tags set value jquery

$('#mySelect').select2({
  data: ['one','two'],
  tags: true
});
$('#mySelect').val(['one','two']).trigger('change')

Select options of Select2 control based on values using Jquery

$('#mySelect2').val('1'); // Select the option with a value of '1'
$('#mySelect2').trigger('change'); // Notify any JS components that the value changed

get select2 selected value jquery

$('#id :selected').text();

Select options of Select2 control based on values using Jquery

$('#mySelect2').val(['1', '2']);
$('#mySelect2').trigger('change'); // Notify any JS components that the value changed

select2 set value jquery

$('#inputID').select2('data', {id: 100, a_key: 'Lorem Ipsum'});

jquery select2 multiple select all

$("#checkbox").click(function(){
    if($("#checkbox").is(':checked') ){
        $("select > option").prop("selected","selected");
    }else{
        $("select > option").removeAttr("selected");
     }
});

select2 set value jquery

$('#all_contacts').select2('data', {id: '123', text: 'res_data.primary_email'});