Sort Dropdown list alphabetically jquery

index.html

<select class="ddlList">
    <option value="3">Three</option>
    <option value="1">One</option>
    <option value="1">one</option>
    <option value="1">a</option>
    <option value="1">b</option>
    <option value="1">A</option>
    <option value="1">B</option>
    <option value="0">Zero</option>
    <option value="2">Two</option>
    <option value="8">Eight</option>
</select>

<select class="ddlList">
    <option value="3">Three</option>
    <option value="1">One</option>
    <option value="1">one</option>
    <option value="1">a</option>
    <option value="1">b</option>
    <option value="1">A</option>
    <option value="1">B</option>
    <option value="0">Zero</option>
    <option value="2">Two</option>
    <option value="8">Eight</option>
</select>
<input type="button" id="btnSort" Value=" Sort Dropdown By Text " />

script.js

//, attr, order

var sortSelect = function (select, attr, order) {
    if(attr === 'text'){
        if(order === 'asc'){
            $(select).html($(select).children('option').sort(function (x, y) {
                return $(x).text().toUpperCase() < $(y).text().toUpperCase() ? -1 : 1;
            }));
            $(select).get(0).selectedIndex = 0;
            e.preventDefault();
        }// end asc
        if(order === 'desc'){
            $(select).html($(select).children('option').sort(function (y, x) {
                return $(x).text().toUpperCase() < $(y).text().toUpperCase() ? -1 : 1;
            }));
            $(select).get(0).selectedIndex = 0;
            e.preventDefault();
        }// end desc
    }

};

//, attr, order
$(document).ready(function () {

    $('#btnSort').click(function (e) {
       $(".ddlList").each(function(){
        sortSelect($(this), 'text', 'asc'); 
       })
    }); // event listener click

});

Sort-Dropdown-list-alphabetically-jquery.markdown

Sort Dropdown list alphabetically jquery

Forked from Alex Bezuska's Pen Sort Dropdown list alphabetically jquery.

Forked from Alex Bezuska's Pen Sort Dropdown list alphabetically jquery.

Forked from Alex Bezuska's Pen Sort Dropdown list alphabetically jquery.

A Pen by Captain Anonymous on CodePen.

License.