Smooth scrolling JS

smoothscroll.js

$(function() {

  'use strict';

  // Define only easing functions required
  jQuery.extend( jQuery.easing,
  {
    easeOutQuart: function (x, t, b, c, d) {
      return -c * ((t=t/d-1)*t*t*t - 1) + b;
    }
  });

  // Smooth scroll into anchors
  // source: https://css-tricks.com/snippets/jquery/smooth-scrolling/
  $('a[href*="#"]:not([href="#"])').click(function() {
    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) {
        $('html, body').animate({
          scrollTop: target.offset().top
        }, 1000, 'easeOutQuart');
        return false;
      }
    }
  });
});