I have found a nice example created by Alex where we can select multiple options on dropdown this is what i was searching for my requirement.
Alex example can found here
In my requirement i have an addition, when user selects more than two values on dropdown then dropwond should show first two selected values on dropdown and if more are selected it should show +1(in case of three items selected) or +2(in case of four are selected).
I have attached Axure file which is downloaded from Alex post please check. CustomCheckboxDropdown.rp (115.8 KB)
can any one please help me how we can do this?