Select2, need to group results into one for display - grouping

Question

I use "multiple select boxes" (select2 examples) and I want to group showing results:
like (only if selected more then X options):
Whithout this the field with the results will be too large. Also, I don't want to make a scroll in the field results.
Is there any ready solution to do this?

Answer 1

I created the solution:
$(document).ready(function() {
$(".test").select2();
});
function select_grouping(obj) {
var min_grouping_count = 3;
var title = ' elements selected';
var count = 0;
if (obj.children('li').length > min_grouping_count) {
if (obj.children('li').length > min_grouping_count) {
count = obj.children('li').length - 1;
obj.children('li').each(function(index, el) {
if (index > 0 && index < count) {
$(this).remove();
}
});
}
obj.children('li:eq(0)').html(count + title);
}
}
$(".test").on("select2:select", function(obj) {
var obj = $('#filtr_test').find('.select2-selection__rendered');
select_grouping(obj);
});
$(".test").on("select2:unselect", function(obj) {
var obj = $('#filtr_test').find('.select2-selection__rendered');
select_grouping(obj);
});
.test {
width: 200px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/select2/4.0.0/js/select2.min.js"></script>
<link href="http://cdnjs.cloudflare.com/ajax/libs/select2/4.0.0/css/select2.min.css" rel="stylesheet" />
<div id="filtr_test">
<select class="test" multiple="multiple">
<option value="1">one</option>
<option value="2">two</option>
<option value="3">three</option>
<option value="4">four</option>
<option value="5">five</option>
<option value="6">six</option>
<option value="7">seven</option>
</select>
</div>