Selectable optgroup using select2

Question

I have used select2 to select multiple options from a drop down, but is it possible for select2 to select the full optgroup?? What I want is when user select the option grou

Answer 1

One option for V 4.0.2 using a select element:

                 
           
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      Pending Acceptance                             
                                    
                   
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JS + JQuery:

$(document).ready(function() {

   $('#source').select2();

$(document).on("click", ".select2-results__group", function(){

    var groupName = $(this).html()
    var options = $('#source option');

    $.each(options, function(key, value){

        if($(value)[0].parentElement.label.indexOf(groupName) >= 0){
            $(value).prop("selected","selected");
        }

    });

    $("#source").trigger("change");
    $("#source").select2('close'); 

  });
});

Fiddle: https://jsfiddle.net/un1oL8w0/4/