Bootstrap Dual listbox and single select with fetching values in alert with add/delete/close option in jquery

Question

Can you please anyone help me how to solve this issue.

Bootstrap have dual listbox option with single/multiple select only.

I need dual listbox with single s

Answer 1

//Html
<select id="sel1">
    <option value="1">1</option>
    <option value="2">2</option>
    <option value="3">3</option>
    <option value="4">4</option>
</select>
<select id="sel2"></select>
//This is the JS
//On change of the first select
$('#sel1').on('change', function (e) {
    e.preventDefault();
    var selVal = $(this).val();
    var selHtml = $(this).find('option:selected').text();
    moveItem('#sel1', '#sel2', selVal, selHtml);//call our function
});
//On change of the second select
$('#sel2').on('change', function (e) {
    e.preventDefault();
    var selVal = $(this).val();
    var selHtml = $(this).find('option:selected').text();
    moveItem('#sel2', '#sel1', selVal, selHtml);//call our function
});
//Move function take 4 parameters
function moveItem(moveFrom, moveTo, selVal, selHtml) {
    if (confirm("Are you sure? : " + selVal)) {//Confirm dialogue box comes up and on selecting 'ok' this part will be executed
        $(moveTo).append('<option value="' + selVal + '">' + selHtml + '</option>');//append a value to select
        var mId = moveFrom + ' option[value="' + selVal + '"]';
        $(mId).remove();//remove value from the other select
    }
    return false;
}