script.js

$(document).ready(function () {

  // animation scroll js
  var html_body = $('html, body');
  $('.page-scroll').on('click', function () { //use page-scroll class in any HTML tag for scrolling
    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 - 0
        }, 1500, "easeInOutExpo");
        return false;
      }
    }
  });

  // easeInOutExpo Declaration
  jQuery.extend(jQuery.easing, {
    easeInOutExpo: function (x, t, b, c, d) {
      if (t == 0) return b;
      if (t == d) return b + c;
      if ((t /= d / 2) < 1) return c / 2 * Math.pow(2, 10 * (t - 1)) + b;
      return c / 2 * (-Math.pow(2, -10 * --t) + 2) + b;
    }
  });

});