Variable time smooth scroll

vtSmoothScroll.js

/**
 * 
 * In real life your time taken to complete a journey = distance/speed.
 * This emulates that, longer journeys actually take more time, shorter journeys take less time.
 * 
 * Forked from http://css-tricks.com/snippets/jquery/smooth-scrolling/
 * Demo http://codepen.io/jbasoo/pen/LEovc
 *
 * Requires jQuery and jQuery Easing
 * 
 */

$(function() {
   $('a[href^=#]:not([href=#])').click(function() { // This targets all internal page links (which may break some other js plugins like tabs/accordions etc. Be more specific with your selector if you have issues.)
        if (location.pathname.replace(/^\//, '') == this.pathname.replace(/^\//, '') && location.hostname == this.hostname) {
            var target = $(this.hash);
            target = target.length ? target : $('[name=' + this.hash.slice(1) + ']');
            if (target.length) {
                var currentLocation = $(window).scrollTop();
                var targetLocation = target.offset().top;
                var distance = Math.abs(currentLocation - targetLocation);
                var speed = 2; // X px per ms
                var time = distance / speed;
                $('html,body').animate({
                    scrollTop: targetLocation
                }, time, 'easeOutCubic');
                return false;
            }
        }
    });
});