Bootstrap Mega Menu Responsive Intelligence

bs3-megamenu-intelligence.js

// Handle Mega Menu Positioning
// Requires Yamm Mega Menu Plugin for Bootstrap3 (http://geedmo.github.io/yamm3/)

$('li.dropdown > a').on('click', function () {
    var screenWidth = $(window).width();
    var xPos = $(this).offset().left;
    var parent = $(this).parent('.dropdown');
    var dropdownWidth = $('.dropdown-menu', parent).width();

    if ((xPos + dropdownWidth) > screenWidth) {
        $('.dropdown-menu', parent).addClass('pull-right');
    } else {
        $('.dropdown-menu', parent).removeClass('pull-right');
    }
});