Bootstrap 3.0 Multilevel Dropdown

N-Level dropdown menu in twitter bootstrap 3.0

by Harsh Bhatnagar

HTML

<script src="//netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css">
<div class="dropdown" style="position:relative">
    <a href="#" class="btn btn-primary dropdown-toggle" data-toggle="dropdown">Click Here <span class="caret"></span></a>
    <ul class="dropdown-menu">
        <li>
            <a class="trigger right-caret">Level 1</a>
            <ul class="dropdown-menu sub-menu">
                <li><a href="#">Level 2</a></li>
                <li>
                    <a class="trigger right-caret">Level 2</a>
                    <ul class="dropdown-menu sub-menu">
                        <li><a href="#">Level 3</a></li>
                        <li><a href="#">Level 3</a></li>
                        <li>
                            <a class="trigger right-caret">Level 3</a>
                            <ul class="dropdown-menu sub-menu">
                                <li><a href="#">Level 4</a></li>
                                <li><a href="#">Level 4</a></li>
                                <li><a href="#">Level 4</a></li>
                            </ul>
                        </li>
                    </ul>
                </li>
                <li><a href="#">Level 2</a></li>
            </ul>
        </li>
        <li><a href="#">Level 1</a></li>
        <li><a href="#">Level 1</a></li>
    </ul>
</div>

CSS

.dropdown-menu>li {
    position: relative;
    -webkit-user-select: none;
    /* Chrome/Safari */
    -moz-user-select: none;
    /* Firefox */
    -ms-user-select: none;
    /* IE10+ */
    /* Rules below not implemented in browsers yet */
    -o-user-select: none;
    user-select: none;
    cursor: pointer;
}

.dropdown-menu .sub-menu {
    left: 100%;
    position: absolute;
    top: 0;
    display: none;
    margin-top: -1px;
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
    border-left-color: #fff;
    box-shadow: none;
}

.right-caret:after,
.left-caret:after {
    content: "";
    border-bottom: 5px solid transparent;
    border-top: 5px solid transparent;
    display: inline-block;
    height: 0;
    vertical-align: middle;
    width: 0;
    margin-left: 5px;
}

.right-caret:after {
    border-left: 5px solid #ffaf46;
}

.left-caret:after {
    border-right: 5px solid #ffaf46;
}

JavaScript

$(function() {
    $(".dropdown-menu > li > a.trigger").on("click", function(e) {
        var current = $(this).next();
        var grandparent = $(this).parent().parent();
        if ($(this).hasClass('left-caret') || $(this).hasClass('right-caret'))
            $(this).toggleClass('right-caret left-caret');
        grandparent.find('.left-caret').not(this).toggleClass('right-caret left-caret');
        grandparent.find(".sub-menu:visible").not(current).hide();
        current.toggle();
        e.stopPropagation();
    });
    $(".dropdown-menu > li > a:not(.trigger)").on("click", function() {
        var root = $(this).closest('.dropdown');
        root.find('.left-caret').toggleClass('right-caret left-caret');
        root.find('.sub-menu:visible').hide();
    });
});