diff --git a/dist/wow.js b/dist/wow.js
old mode 100644
new mode 100755
index 1db78ea..5a26b44
--- a/dist/wow.js
+++ b/dist/wow.js
@@ -1,152 +1,194 @@
-(function() {
-  var MutationObserver, Util, WeakMap, getComputedStyle, getComputedStyleRX,
-    bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; },
-    indexOf = [].indexOf || function(item) { for (var i = 0, l = this.length; i < l; i++) { if (i in this && this[i] === item) return i; } return -1; };
+'use strict';
 
-  Util = (function() {
-    function Util() {}
+var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
 
-    Util.prototype.extend = function(custom, defaults) {
-      var key, value;
-      for (key in defaults) {
-        value = defaults[key];
-        if (custom[key] == null) {
-          custom[key] = value;
-        }
-      }
-      return custom;
-    };
+function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
 
-    Util.prototype.isMobile = function(agent) {
-      return /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(agent);
-    };
+(function () {
+  // Name    : wow
+  // Author  : Matthieu Aussaguel, http://mynameismatthieu.com/, @mattaussaguel
+  // Version : 1.1.2
+  // Repo    : https://github.com/matthieua/WOW
+  // Website : http://mynameismatthieu.com/wow
 
-    Util.prototype.createEvent = function(event, bubble, cancel, detail) {
-      var customEvent;
-      if (bubble == null) {
-        bubble = false;
-      }
-      if (cancel == null) {
-        cancel = false;
-      }
-      if (detail == null) {
-        detail = null;
-      }
-      if (document.createEvent != null) {
-        customEvent = document.createEvent('CustomEvent');
-        customEvent.initCustomEvent(event, bubble, cancel, detail);
-      } else if (document.createEventObject != null) {
-        customEvent = document.createEventObject();
-        customEvent.eventType = event;
-      } else {
-        customEvent.eventName = event;
-      }
-      return customEvent;
-    };
+  var MutationObserver,
+      Util,
+      WeakMap,
+      getComputedStyle,
+      getComputedStyleRX,
+      indexOf = [].indexOf;
 
-    Util.prototype.emitEvent = function(elem, event) {
-      if (elem.dispatchEvent != null) {
-        return elem.dispatchEvent(event);
-      } else if (event in (elem != null)) {
-        return elem[event]();
-      } else if (("on" + event) in (elem != null)) {
-        return elem["on" + event]();
-      }
-    };
+  Util = function () {
+    function Util() {
+      _classCallCheck(this, Util);
+    }
 
-    Util.prototype.addEvent = function(elem, event, fn) {
-      if (elem.addEventListener != null) {
-        return elem.addEventListener(event, fn, false);
-      } else if (elem.attachEvent != null) {
-        return elem.attachEvent("on" + event, fn);
-      } else {
-        return elem[event] = fn;
+    _createClass(Util, [{
+      key: 'extend',
+      value: function extend(custom, defaults) {
+        var key, value;
+        for (key in defaults) {
+          value = defaults[key];
+          if (custom[key] == null) {
+            custom[key] = value;
+          }
+        }
+        return custom;
+      }
+    }, {
+      key: 'isMobile',
+      value: function isMobile(agent) {
+        return (/Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(agent)
+        );
+      }
+    }, {
+      key: 'createEvent',
+      value: function createEvent(event) {
+        var bubble = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
+        var cancel = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
+        var detail = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : null;
+
+        var customEvent;
+        if (document.createEvent != null) {
+          customEvent = document.createEvent('CustomEvent');
+          customEvent.initCustomEvent(event, bubble, cancel, detail);
+        } else if (document.createEventObject != null) {
+          customEvent = document.createEventObject();
+          customEvent.eventType = event;
+        } else {
+          customEvent.eventName = event; // IE DOM < 9
+          // W3C DOM
+        }
+        return customEvent;
+      }
+    }, {
+      key: 'emitEvent',
+      value: function emitEvent(elem, event) {
+        if (elem.dispatchEvent != null) {
+          return elem.dispatchEvent(event);
+        } else if (event in (elem != null)) {
+          return elem[event]();
+        } else if ('on' + event in (elem != null)) {
+          return elem['on' + event](); // W3C DOM
+        }
       }
-    };
-
-    Util.prototype.removeEvent = function(elem, event, fn) {
-      if (elem.removeEventListener != null) {
-        return elem.removeEventListener(event, fn, false);
-      } else if (elem.detachEvent != null) {
-        return elem.detachEvent("on" + event, fn);
-      } else {
-        return delete elem[event];
+    }, {
+      key: 'addEvent',
+      value: function addEvent(elem, event, fn) {
+        if (elem.addEventListener != null) {
+          return elem.addEventListener(event, fn, false);
+        } else if (elem.attachEvent != null) {
+          return elem.attachEvent('on' + event, fn); // fallback
+        } else {
+          return elem[event] = fn; // IE DOM
+          // W3C DOM
+        }
       }
-    };
-
-    Util.prototype.innerHeight = function() {
-      if ('innerHeight' in window) {
-        return window.innerHeight;
-      } else {
-        return document.documentElement.clientHeight;
+    }, {
+      key: 'removeEvent',
+      value: function removeEvent(elem, event, fn) {
+        if (elem.removeEventListener != null) {
+          return elem.removeEventListener(event, fn, false);
+        } else if (elem.detachEvent != null) {
+          return elem.detachEvent('on' + event, fn); // fallback
+        } else {
+          return delete elem[event]; // IE DOM
+          // W3C DOM
+        }
       }
-    };
+    }, {
+      key: 'innerHeight',
+      value: function innerHeight() {
+        if ('innerHeight' in window) {
+          return window.innerHeight;
+        } else {
+          return document.documentElement.clientHeight;
+        }
+      }
+    }]);
 
     return Util;
+  }();
 
-  })();
-
-  WeakMap = this.WeakMap || this.MozWeakMap || (WeakMap = (function() {
+  // Minimalistic WeakMap shim, just in case.
+  WeakMap = this.WeakMap || this.MozWeakMap || (WeakMap = function () {
     function WeakMap() {
+      _classCallCheck(this, WeakMap);
+
       this.keys = [];
       this.values = [];
     }
 
-    WeakMap.prototype.get = function(key) {
-      var i, item, j, len, ref;
-      ref = this.keys;
-      for (i = j = 0, len = ref.length; j < len; i = ++j) {
-        item = ref[i];
-        if (item === key) {
-          return this.values[i];
+    _createClass(WeakMap, [{
+      key: 'get',
+      value: function get(key) {
+        var i, item, j, len, ref;
+        ref = this.keys;
+        for (i = j = 0, len = ref.length; j < len; i = ++j) {
+          item = ref[i];
+          if (item === key) {
+            return this.values[i];
+          }
         }
       }
-    };
-
-    WeakMap.prototype.set = function(key, value) {
-      var i, item, j, len, ref;
-      ref = this.keys;
-      for (i = j = 0, len = ref.length; j < len; i = ++j) {
-        item = ref[i];
-        if (item === key) {
-          this.values[i] = value;
-          return;
+    }, {
+      key: 'set',
+      value: function set(key, value) {
+        var i, item, j, len, ref;
+        ref = this.keys;
+        for (i = j = 0, len = ref.length; j < len; i = ++j) {
+          item = ref[i];
+          if (item === key) {
+            this.values[i] = value;
+            return;
+          }
         }
+        this.keys.push(key);
+        return this.values.push(value);
       }
-      this.keys.push(key);
-      return this.values.push(value);
-    };
+    }]);
 
     return WeakMap;
+  }());
 
-  })());
+  // Dummy MutationObserver, to avoid raising exceptions.
+  MutationObserver = this.MutationObserver || this.WebkitMutationObserver || this.MozMutationObserver || (MutationObserver = function () {
+    var MutationObserver = function () {
+      function MutationObserver() {
+        _classCallCheck(this, MutationObserver);
 
-  MutationObserver = this.MutationObserver || this.WebkitMutationObserver || this.MozMutationObserver || (MutationObserver = (function() {
-    function MutationObserver() {
-      if (typeof console !== "undefined" && console !== null) {
-        console.warn('MutationObserver is not supported by your browser.');
-      }
-      if (typeof console !== "undefined" && console !== null) {
-        console.warn('WOW.js cannot detect dom mutations, please call .sync() after loading new content.');
+        if (typeof console !== "undefined" && console !== null) {
+          console.warn('MutationObserver is not supported by your browser.');
+        }
+        if (typeof console !== "undefined" && console !== null) {
+          console.warn('WOW.js cannot detect dom mutations, please call .sync() after loading new content.');
+        }
       }
-    }
 
-    MutationObserver.notSupported = true;
+      _createClass(MutationObserver, [{
+        key: 'observe',
+        value: function observe() {}
+      }]);
 
-    MutationObserver.prototype.observe = function() {};
+      return MutationObserver;
+    }();
 
-    return MutationObserver;
+    ;
 
-  })());
+    MutationObserver.notSupported = true;
+
+    return MutationObserver;
+  }.call(this));
 
-  getComputedStyle = this.getComputedStyle || function(el, pseudo) {
-    this.getPropertyValue = function(prop) {
+  // getComputedStyle shim, from http://stackoverflow.com/a/21797294
+  getComputedStyle = this.getComputedStyle || function (el, pseudo) {
+    this.getPropertyValue = function (prop) {
       var ref;
       if (prop === 'float') {
         prop = 'styleFloat';
       }
       if (getComputedStyleRX.test(prop)) {
-        prop.replace(getComputedStyleRX, function(_, _char) {
+        prop.replace(getComputedStyleRX, function (_, _char) {
           return _char.toUpperCase();
         });
       }
@@ -157,357 +199,404 @@
 
   getComputedStyleRX = /(\-([a-z]){1})/g;
 
-  this.WOW = (function() {
-    WOW.prototype.defaults = {
-      boxClass: 'wow',
-      animateClass: 'animated',
-      offset: 0,
-      mobile: true,
-      live: true,
-      callback: null,
-      scrollContainer: null
-    };
-
-    function WOW(options) {
-      if (options == null) {
-        options = {};
-      }
-      this.scrollCallback = bind(this.scrollCallback, this);
-      this.scrollHandler = bind(this.scrollHandler, this);
-      this.resetAnimation = bind(this.resetAnimation, this);
-      this.start = bind(this.start, this);
-      this.scrolled = true;
-      this.config = this.util().extend(options, this.defaults);
-      if (options.scrollContainer != null) {
-        this.config.scrollContainer = document.querySelector(options.scrollContainer);
-      }
-      this.animationNameCache = new WeakMap();
-      this.wowEvent = this.util().createEvent(this.config.boxClass);
-    }
-
-    WOW.prototype.init = function() {
-      var ref;
-      this.element = window.document.documentElement;
-      if ((ref = document.readyState) === "interactive" || ref === "complete") {
-        this.start();
-      } else {
-        this.util().addEvent(document, 'DOMContentLoaded', this.start);
-      }
-      return this.finished = [];
-    };
-
-    WOW.prototype.start = function() {
-      var box, j, len, ref;
-      this.stopped = false;
-      this.boxes = (function() {
-        var j, len, ref, results;
-        ref = this.element.querySelectorAll("." + this.config.boxClass);
-        results = [];
-        for (j = 0, len = ref.length; j < len; j++) {
-          box = ref[j];
-          results.push(box);
-        }
-        return results;
-      }).call(this);
-      this.all = (function() {
-        var j, len, ref, results;
-        ref = this.boxes;
-        results = [];
-        for (j = 0, len = ref.length; j < len; j++) {
-          box = ref[j];
-          results.push(box);
-        }
-        return results;
-      }).call(this);
-      if (this.boxes.length) {
-        if (this.disabled()) {
-          this.resetStyle();
-        } else {
-          ref = this.boxes;
-          for (j = 0, len = ref.length; j < len; j++) {
-            box = ref[j];
-            this.applyStyle(box, true);
+  this.WOW = function () {
+    var WOW = function () {
+      function WOW() {
+        var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
+
+        _classCallCheck(this, WOW);
+
+        this.start = this.start.bind(this);
+        this.resetAnimation = this.resetAnimation.bind(this);
+        // fast window.scroll callback
+        this.scrollHandler = this.scrollHandler.bind(this);
+        this.scrollCallback = this.scrollCallback.bind(this);
+        this.scrolled = true;
+        this.config = this.util().extend(options, this.defaults);
+        if (options.scrollContainer != null) {
+          this.config.scrollContainer = document.querySelector(options.scrollContainer);
+        }
+        // Map of elements to animation names:
+        this.animationNameCache = new WeakMap();
+        this.wowEvent = this.util().createEvent(this.config.boxClass);
+      }
+
+      _createClass(WOW, [{
+        key: 'init',
+        value: function init() {
+          var ref;
+          this.element = window.document.documentElement;
+          if ((ref = document.readyState) === "interactive" || ref === "complete") {
+            this.start();
+          } else {
+            this.util().addEvent(document, 'DOMContentLoaded', this.start);
           }
+          return this.finished = [];
         }
-      }
-      if (!this.disabled()) {
-        this.util().addEvent(this.config.scrollContainer || window, 'scroll', this.scrollHandler);
-        this.util().addEvent(window, 'resize', this.scrollHandler);
-        this.interval = setInterval(this.scrollCallback, 50);
-      }
-      if (this.config.live) {
-        return new MutationObserver((function(_this) {
-          return function(records) {
-            var k, len1, node, record, results;
+      }, {
+        key: 'start',
+        value: function start() {
+          var _this = this;
+
+          var box, j, len, ref;
+          this.stopped = false;
+          this.boxes = function () {
+            var j, len, ref, results;
+            ref = this.element.querySelectorAll('.' + this.config.boxClass);
             results = [];
-            for (k = 0, len1 = records.length; k < len1; k++) {
-              record = records[k];
-              results.push((function() {
-                var l, len2, ref1, results1;
-                ref1 = record.addedNodes || [];
-                results1 = [];
-                for (l = 0, len2 = ref1.length; l < len2; l++) {
-                  node = ref1[l];
-                  results1.push(this.doSync(node));
-                }
-                return results1;
-              }).call(_this));
+            for (j = 0, len = ref.length; j < len; j++) {
+              box = ref[j];
+              results.push(box);
             }
             return results;
-          };
-        })(this)).observe(document.body, {
-          childList: true,
-          subtree: true
-        });
-      }
-    };
-
-    WOW.prototype.stop = function() {
-      this.stopped = true;
-      this.util().removeEvent(this.config.scrollContainer || window, 'scroll', this.scrollHandler);
-      this.util().removeEvent(window, 'resize', this.scrollHandler);
-      if (this.interval != null) {
-        return clearInterval(this.interval);
-      }
-    };
-
-    WOW.prototype.sync = function(element) {
-      if (MutationObserver.notSupported) {
-        return this.doSync(this.element);
-      }
-    };
-
-    WOW.prototype.doSync = function(element) {
-      var box, j, len, ref, results;
-      if (element == null) {
-        element = this.element;
-      }
-      if (element.nodeType !== 1) {
-        return;
-      }
-      element = element.parentNode || element;
-      ref = element.querySelectorAll("." + this.config.boxClass);
-      results = [];
-      for (j = 0, len = ref.length; j < len; j++) {
-        box = ref[j];
-        if (indexOf.call(this.all, box) < 0) {
-          this.boxes.push(box);
-          this.all.push(box);
-          if (this.stopped || this.disabled()) {
-            this.resetStyle();
-          } else {
-            this.applyStyle(box, true);
+          }.call(this);
+          this.all = function () {
+            var j, len, ref, results;
+            ref = this.boxes;
+            results = [];
+            for (j = 0, len = ref.length; j < len; j++) {
+              box = ref[j];
+              results.push(box);
+            }
+            return results;
+          }.call(this);
+          if (this.boxes.length) {
+            if (this.disabled()) {
+              this.resetStyle();
+            } else {
+              ref = this.boxes;
+              for (j = 0, len = ref.length; j < len; j++) {
+                box = ref[j];
+                this.applyStyle(box, true);
+              }
+            }
+          }
+          if (!this.disabled()) {
+            this.util().addEvent(this.config.scrollContainer || window, 'scroll', this.scrollHandler);
+            this.util().addEvent(window, 'resize', this.scrollHandler);
+            this.interval = setInterval(this.scrollCallback, 50);
+          }
+          if (this.config.live) {
+            return new MutationObserver(function (records) {
+              var k, len1, node, record, results;
+              results = [];
+              for (k = 0, len1 = records.length; k < len1; k++) {
+                record = records[k];
+                results.push(function () {
+                  var l, len2, ref1, results1;
+                  ref1 = record.addedNodes || [];
+                  results1 = [];
+                  for (l = 0, len2 = ref1.length; l < len2; l++) {
+                    node = ref1[l];
+                    results1.push(this.doSync(node));
+                  }
+                  return results1;
+                }.call(_this));
+              }
+              return results;
+            }).observe(document.body, {
+              childList: true,
+              subtree: true
+            });
           }
-          results.push(this.scrolled = true);
-        } else {
-          results.push(void 0);
         }
-      }
-      return results;
-    };
 
-    WOW.prototype.show = function(box) {
-      this.applyStyle(box);
-      box.className = box.className + " " + this.config.animateClass;
-      if (this.config.callback != null) {
-        this.config.callback(box);
-      }
-      this.util().emitEvent(box, this.wowEvent);
-      this.util().addEvent(box, 'animationend', this.resetAnimation);
-      this.util().addEvent(box, 'oanimationend', this.resetAnimation);
-      this.util().addEvent(box, 'webkitAnimationEnd', this.resetAnimation);
-      this.util().addEvent(box, 'MSAnimationEnd', this.resetAnimation);
-      return box;
-    };
+        // unbind the scroll event
 
-    WOW.prototype.applyStyle = function(box, hidden) {
-      var delay, duration, iteration;
-      duration = box.getAttribute('data-wow-duration');
-      delay = box.getAttribute('data-wow-delay');
-      iteration = box.getAttribute('data-wow-iteration');
-      return this.animate((function(_this) {
-        return function() {
-          return _this.customStyle(box, hidden, duration, delay, iteration);
-        };
-      })(this));
-    };
-
-    WOW.prototype.animate = (function() {
-      if ('requestAnimationFrame' in window) {
-        return function(callback) {
-          return window.requestAnimationFrame(callback);
-        };
-      } else {
-        return function(callback) {
-          return callback();
-        };
-      }
-    })();
-
-    WOW.prototype.resetStyle = function() {
-      var box, j, len, ref, results;
-      ref = this.boxes;
-      results = [];
-      for (j = 0, len = ref.length; j < len; j++) {
-        box = ref[j];
-        results.push(box.style.visibility = 'visible');
-      }
-      return results;
-    };
-
-    WOW.prototype.resetAnimation = function(event) {
-      var target;
-      if (event.type.toLowerCase().indexOf('animationend') >= 0) {
-        target = event.target || event.srcElement;
-        return target.className = target.className.replace(this.config.animateClass, '').trim();
-      }
-    };
-
-    WOW.prototype.customStyle = function(box, hidden, duration, delay, iteration) {
-      if (hidden) {
-        this.cacheAnimationName(box);
-      }
-      box.style.visibility = hidden ? 'hidden' : 'visible';
-      if (duration) {
-        this.vendorSet(box.style, {
-          animationDuration: duration
-        });
-      }
-      if (delay) {
-        this.vendorSet(box.style, {
-          animationDelay: delay
-        });
-      }
-      if (iteration) {
-        this.vendorSet(box.style, {
-          animationIterationCount: iteration
-        });
-      }
-      this.vendorSet(box.style, {
-        animationName: hidden ? 'none' : this.cachedAnimationName(box)
-      });
-      return box;
-    };
-
-    WOW.prototype.vendors = ["moz", "webkit"];
-
-    WOW.prototype.vendorSet = function(elem, properties) {
-      var name, results, value, vendor;
-      results = [];
-      for (name in properties) {
-        value = properties[name];
-        elem["" + name] = value;
-        results.push((function() {
-          var j, len, ref, results1;
-          ref = this.vendors;
-          results1 = [];
+      }, {
+        key: 'stop',
+        value: function stop() {
+          this.stopped = true;
+          this.util().removeEvent(this.config.scrollContainer || window, 'scroll', this.scrollHandler);
+          this.util().removeEvent(window, 'resize', this.scrollHandler);
+          if (this.interval != null) {
+            return clearInterval(this.interval);
+          }
+        }
+      }, {
+        key: 'sync',
+        value: function sync(element) {
+          if (MutationObserver.notSupported) {
+            return this.doSync(this.element);
+          }
+        }
+      }, {
+        key: 'doSync',
+        value: function doSync(element) {
+          var box, j, len, ref, results;
+          if (element == null) {
+            element = this.element;
+          }
+          if (element.nodeType !== 1) {
+            return;
+          }
+          element = element.parentNode || element;
+          ref = element.querySelectorAll('.' + this.config.boxClass);
+          results = [];
           for (j = 0, len = ref.length; j < len; j++) {
-            vendor = ref[j];
-            results1.push(elem["" + vendor + (name.charAt(0).toUpperCase()) + (name.substr(1))] = value);
+            box = ref[j];
+            if (indexOf.call(this.all, box) < 0) {
+              this.boxes.push(box);
+              this.all.push(box);
+              if (this.stopped || this.disabled()) {
+                this.resetStyle();
+              } else {
+                this.applyStyle(box, true);
+              }
+              results.push(this.scrolled = true);
+            } else {
+              results.push(void 0);
+            }
           }
-          return results1;
-        }).call(this));
-      }
-      return results;
-    };
-
-    WOW.prototype.vendorCSS = function(elem, property) {
-      var j, len, ref, result, style, vendor;
-      style = getComputedStyle(elem);
-      result = style.getPropertyCSSValue(property);
-      ref = this.vendors;
-      for (j = 0, len = ref.length; j < len; j++) {
-        vendor = ref[j];
-        result = result || style.getPropertyCSSValue("-" + vendor + "-" + property);
-      }
-      return result;
-    };
-
-    WOW.prototype.animationName = function(box) {
-      var animationName, error;
-      try {
-        animationName = this.vendorCSS(box, 'animation-name').cssText;
-      } catch (error) {
-        animationName = getComputedStyle(box).getPropertyValue('animation-name');
-      }
-      if (animationName === 'none') {
-        return '';
-      } else {
-        return animationName;
-      }
-    };
-
-    WOW.prototype.cacheAnimationName = function(box) {
-      return this.animationNameCache.set(box, this.animationName(box));
-    };
-
-    WOW.prototype.cachedAnimationName = function(box) {
-      return this.animationNameCache.get(box);
-    };
+          return results;
+        }
 
-    WOW.prototype.scrollHandler = function() {
-      return this.scrolled = true;
-    };
+        // show box element
 
-    WOW.prototype.scrollCallback = function() {
-      var box;
-      if (this.scrolled) {
-        this.scrolled = false;
-        this.boxes = (function() {
-          var j, len, ref, results;
+      }, {
+        key: 'show',
+        value: function show(box) {
+          this.applyStyle(box);
+          box.className = box.className + ' ' + this.config.animateClass;
+          if (this.config.callback != null) {
+            this.config.callback(box);
+          }
+          this.util().emitEvent(box, this.wowEvent);
+          this.util().addEvent(box, 'animationend', this.resetAnimation);
+          this.util().addEvent(box, 'oanimationend', this.resetAnimation);
+          this.util().addEvent(box, 'webkitAnimationEnd', this.resetAnimation);
+          this.util().addEvent(box, 'MSAnimationEnd', this.resetAnimation);
+          return box;
+        }
+      }, {
+        key: 'applyStyle',
+        value: function applyStyle(box, hidden) {
+          var _this2 = this;
+
+          var delay, duration, iteration;
+          duration = box.getAttribute('data-wow-duration');
+          delay = box.getAttribute('data-wow-delay');
+          iteration = box.getAttribute('data-wow-iteration');
+          return this.animate(function () {
+            return _this2.customStyle(box, hidden, duration, delay, iteration);
+          });
+        }
+      }, {
+        key: 'resetStyle',
+        value: function resetStyle() {
+          var box, j, len, ref, results;
           ref = this.boxes;
           results = [];
           for (j = 0, len = ref.length; j < len; j++) {
             box = ref[j];
-            if (!(box)) {
-              continue;
-            }
-            if (this.isVisible(box)) {
-              this.show(box);
-              continue;
-            }
-            results.push(box);
+            results.push(box.style.opacity = 1);
           }
           return results;
-        }).call(this);
-        if (!(this.boxes.length || this.config.live)) {
-          return this.stop();
         }
-      }
-    };
+      }, {
+        key: 'resetAnimation',
+        value: function resetAnimation(event) {
+          var target;
+          if (event.type.toLowerCase().indexOf('animationend') >= 0) {
+            target = event.target || event.srcElement;
+            return target.className = target.className.replace(this.config.animateClass, '').trim();
+          }
+        }
+      }, {
+        key: 'customStyle',
+        value: function customStyle(box, hidden, duration, delay, iteration) {
+          if (hidden) {
+            this.cacheAnimationName(box);
+          }
+          box.style.opacity = 0 ? 0 : 1;
+          if (duration) {
+            this.vendorSet(box.style, {
+              animationDuration: duration
+            });
+          }
+          if (delay) {
+            this.vendorSet(box.style, {
+              animationDelay: delay
+            });
+          }
+          if (iteration) {
+            this.vendorSet(box.style, {
+              animationIterationCount: iteration
+            });
+          }
+          this.vendorSet(box.style, {
+            animationName: hidden ? 'none' : this.cachedAnimationName(box)
+          });
+          return box;
+        }
+      }, {
+        key: 'vendorSet',
+        value: function vendorSet(elem, properties) {
+          var name, results, value, vendor;
+          results = [];
+          for (name in properties) {
+            value = properties[name];
+            elem['' + name] = value;
+            results.push(function () {
+              var j, len, ref, results1;
+              ref = this.vendors;
+              results1 = [];
+              for (j = 0, len = ref.length; j < len; j++) {
+                vendor = ref[j];
+                results1.push(elem['' + vendor + name.charAt(0).toUpperCase() + name.substr(1)] = value);
+              }
+              return results1;
+            }.call(this));
+          }
+          return results;
+        }
+      }, {
+        key: 'vendorCSS',
+        value: function vendorCSS(elem, property) {
+          var j, len, ref, result, style, vendor;
+          style = getComputedStyle(elem);
+          result = style.getPropertyCSSValue(property);
+          ref = this.vendors;
+          for (j = 0, len = ref.length; j < len; j++) {
+            vendor = ref[j];
+            result = result || style.getPropertyCSSValue('-' + vendor + '-' + property);
+          }
+          return result;
+        }
+      }, {
+        key: 'animationName',
+        value: function animationName(box) {
+          var animationName;
+          try {
+            animationName = this.vendorCSS(box, 'animation-name').cssText; // Opera, fall back to plain property value
+          } catch (error) {
+            animationName = getComputedStyle(box).getPropertyValue('animation-name');
+          }
+          if (animationName === 'none') {
+            return ''; // SVG/Firefox, unable to get animation name?
+          } else {
+            return animationName;
+          }
+        }
+      }, {
+        key: 'cacheAnimationName',
+        value: function cacheAnimationName(box) {
+          // https://bugzilla.mozilla.org/show_bug.cgi?id=921834
+          // box.dataset is not supported for SVG elements in Firefox
+          return this.animationNameCache.set(box, this.animationName(box));
+        }
+      }, {
+        key: 'cachedAnimationName',
+        value: function cachedAnimationName(box) {
+          return this.animationNameCache.get(box);
+        }
+      }, {
+        key: 'scrollHandler',
+        value: function scrollHandler() {
+          return this.scrolled = true;
+        }
+      }, {
+        key: 'scrollCallback',
+        value: function scrollCallback() {
+          var box;
+          if (this.scrolled) {
+            this.scrolled = false;
+            this.boxes = function () {
+              var j, len, ref, results;
+              ref = this.boxes;
+              results = [];
+              for (j = 0, len = ref.length; j < len; j++) {
+                box = ref[j];
+                if (!box) {
+                  continue;
+                }
+                if (this.isVisible(box)) {
+                  this.show(box);
+                  continue;
+                }
+                results.push(box);
+              }
+              return results;
+            }.call(this);
+            if (!(this.boxes.length || this.config.live)) {
+              return this.stop();
+            }
+          }
+        }
 
-    WOW.prototype.offsetTop = function(element) {
-      var top;
-      while (element.offsetTop === void 0) {
-        element = element.parentNode;
-      }
-      top = element.offsetTop;
-      while (element = element.offsetParent) {
-        top += element.offsetTop;
-      }
-      return top;
-    };
+        // Calculate element offset top
+
+      }, {
+        key: 'offsetTop',
+        value: function offsetTop(element) {
+          var top;
+          while (element.offsetTop === void 0) {
+            // SVG elements don't have an offsetTop in Firefox.
+            // This will use their nearest parent that has an offsetTop.
+            // Also, using ('offsetTop' of element) causes an exception in Firefox.
+            element = element.parentNode;
+          }
+          top = element.offsetTop;
+          while (element = element.offsetParent) {
+            top += element.offsetTop;
+          }
+          return top;
+        }
 
-    WOW.prototype.isVisible = function(box) {
-      var bottom, offset, top, viewBottom, viewTop;
-      offset = box.getAttribute('data-wow-offset') || this.config.offset;
-      viewTop = (this.config.scrollContainer && this.config.scrollContainer.scrollTop) || window.pageYOffset;
-      viewBottom = viewTop + Math.min(this.element.clientHeight, this.util().innerHeight()) - offset;
-      top = this.offsetTop(box);
-      bottom = top + box.clientHeight;
-      return top <= viewBottom && bottom >= viewTop;
-    };
+        // check if box is visible
+
+      }, {
+        key: 'isVisible',
+        value: function isVisible(box) {
+          var bottom, offset, top, viewBottom, viewTop;
+          offset = box.getAttribute('data-wow-offset') || this.config.offset;
+          viewTop = this.config.scrollContainer && this.config.scrollContainer.scrollTop || window.pageYOffset;
+          viewBottom = viewTop + Math.min(this.element.clientHeight, this.util().innerHeight()) - offset;
+          top = this.offsetTop(box);
+          bottom = top + box.clientHeight;
+          return top <= viewBottom && bottom >= viewTop;
+        }
+      }, {
+        key: 'util',
+        value: function util() {
+          return this._util != null ? this._util : this._util = new Util();
+        }
+      }, {
+        key: 'disabled',
+        value: function disabled() {
+          return !this.config.mobile && this.util().isMobile(navigator.userAgent);
+        }
+      }]);
 
-    WOW.prototype.util = function() {
-      return this._util != null ? this._util : this._util = new Util();
-    };
+      return WOW;
+    }();
+
+    ;
 
-    WOW.prototype.disabled = function() {
-      return !this.config.mobile && this.util().isMobile(navigator.userAgent);
+    WOW.prototype.defaults = {
+      boxClass: 'wow',
+      animateClass: 'animated',
+      offset: 0,
+      mobile: true,
+      live: true,
+      callback: null,
+      scrollContainer: null
     };
 
-    return WOW;
+    WOW.prototype.animate = function () {
+      if ('requestAnimationFrame' in window) {
+        return function (callback) {
+          return window.requestAnimationFrame(callback);
+        };
+      } else {
+        return function (callback) {
+          return callback();
+        };
+      }
+    }();
 
-  })();
+    WOW.prototype.vendors = ["moz", "webkit"];
 
-}).call(this);
+    return WOW;
+  }.call(this);
+}).call(undefined);
diff --git a/dist/wow.min.js b/dist/wow.min.js
old mode 100644
new mode 100755
index 0a646f2..b7a8f46
--- a/dist/wow.min.js
+++ b/dist/wow.min.js
@@ -1,2 +1,40 @@
 /*! WOW - v1.1.3 - 2016-05-06
-* Copyright (c) 2016 Matthieu Aussaguel;*/(function(){var a,b,c,d,e,f=function(a,b){return function(){return a.apply(b,arguments)}},g=[].indexOf||function(a){for(var b=0,c=this.length;c>b;b++)if(b in this&&this[b]===a)return b;return-1};b=function(){function a(){}return a.prototype.extend=function(a,b){var c,d;for(c in b)d=b[c],null==a[c]&&(a[c]=d);return a},a.prototype.isMobile=function(a){return/Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(a)},a.prototype.createEvent=function(a,b,c,d){var e;return null==b&&(b=!1),null==c&&(c=!1),null==d&&(d=null),null!=document.createEvent?(e=document.createEvent("CustomEvent"),e.initCustomEvent(a,b,c,d)):null!=document.createEventObject?(e=document.createEventObject(),e.eventType=a):e.eventName=a,e},a.prototype.emitEvent=function(a,b){return null!=a.dispatchEvent?a.dispatchEvent(b):b in(null!=a)?a[b]():"on"+b in(null!=a)?a["on"+b]():void 0},a.prototype.addEvent=function(a,b,c){return null!=a.addEventListener?a.addEventListener(b,c,!1):null!=a.attachEvent?a.attachEvent("on"+b,c):a[b]=c},a.prototype.removeEvent=function(a,b,c){return null!=a.removeEventListener?a.removeEventListener(b,c,!1):null!=a.detachEvent?a.detachEvent("on"+b,c):delete a[b]},a.prototype.innerHeight=function(){return"innerHeight"in window?window.innerHeight:document.documentElement.clientHeight},a}(),c=this.WeakMap||this.MozWeakMap||(c=function(){function a(){this.keys=[],this.values=[]}return a.prototype.get=function(a){var b,c,d,e,f;for(f=this.keys,b=d=0,e=f.length;e>d;b=++d)if(c=f[b],c===a)return this.values[b]},a.prototype.set=function(a,b){var c,d,e,f,g;for(g=this.keys,c=e=0,f=g.length;f>e;c=++e)if(d=g[c],d===a)return void(this.values[c]=b);return this.keys.push(a),this.values.push(b)},a}()),a=this.MutationObserver||this.WebkitMutationObserver||this.MozMutationObserver||(a=function(){function a(){"undefined"!=typeof console&&null!==console&&console.warn("MutationObserver is not supported by your browser."),"undefined"!=typeof console&&null!==console&&console.warn("WOW.js cannot detect dom mutations, please call .sync() after loading new content.")}return a.notSupported=!0,a.prototype.observe=function(){},a}()),d=this.getComputedStyle||function(a,b){return this.getPropertyValue=function(b){var c;return"float"===b&&(b="styleFloat"),e.test(b)&&b.replace(e,function(a,b){return b.toUpperCase()}),(null!=(c=a.currentStyle)?c[b]:void 0)||null},this},e=/(\-([a-z]){1})/g,this.WOW=function(){function e(a){null==a&&(a={}),this.scrollCallback=f(this.scrollCallback,this),this.scrollHandler=f(this.scrollHandler,this),this.resetAnimation=f(this.resetAnimation,this),this.start=f(this.start,this),this.scrolled=!0,this.config=this.util().extend(a,this.defaults),null!=a.scrollContainer&&(this.config.scrollContainer=document.querySelector(a.scrollContainer)),this.animationNameCache=new c,this.wowEvent=this.util().createEvent(this.config.boxClass)}return e.prototype.defaults={boxClass:"wow",animateClass:"animated",offset:0,mobile:!0,live:!0,callback:null,scrollContainer:null},e.prototype.init=function(){var a;return this.element=window.document.documentElement,"interactive"===(a=document.readyState)||"complete"===a?this.start():this.util().addEvent(document,"DOMContentLoaded",this.start),this.finished=[]},e.prototype.start=function(){var b,c,d,e;if(this.stopped=!1,this.boxes=function(){var a,c,d,e;for(d=this.element.querySelectorAll("."+this.config.boxClass),e=[],a=0,c=d.length;c>a;a++)b=d[a],e.push(b);return e}.call(this),this.all=function(){var a,c,d,e;for(d=this.boxes,e=[],a=0,c=d.length;c>a;a++)b=d[a],e.push(b);return e}.call(this),this.boxes.length)if(this.disabled())this.resetStyle();else for(e=this.boxes,c=0,d=e.length;d>c;c++)b=e[c],this.applyStyle(b,!0);return this.disabled()||(this.util().addEvent(this.config.scrollContainer||window,"scroll",this.scrollHandler),this.util().addEvent(window,"resize",this.scrollHandler),this.interval=setInterval(this.scrollCallback,50)),this.config.live?new a(function(a){return function(b){var c,d,e,f,g;for(g=[],c=0,d=b.length;d>c;c++)f=b[c],g.push(function(){var a,b,c,d;for(c=f.addedNodes||[],d=[],a=0,b=c.length;b>a;a++)e=c[a],d.push(this.doSync(e));return d}.call(a));return g}}(this)).observe(document.body,{childList:!0,subtree:!0}):void 0},e.prototype.stop=function(){return this.stopped=!0,this.util().removeEvent(this.config.scrollContainer||window,"scroll",this.scrollHandler),this.util().removeEvent(window,"resize",this.scrollHandler),null!=this.interval?clearInterval(this.interval):void 0},e.prototype.sync=function(b){return a.notSupported?this.doSync(this.element):void 0},e.prototype.doSync=function(a){var b,c,d,e,f;if(null==a&&(a=this.element),1===a.nodeType){for(a=a.parentNode||a,e=a.querySelectorAll("."+this.config.boxClass),f=[],c=0,d=e.length;d>c;c++)b=e[c],g.call(this.all,b)<0?(this.boxes.push(b),this.all.push(b),this.stopped||this.disabled()?this.resetStyle():this.applyStyle(b,!0),f.push(this.scrolled=!0)):f.push(void 0);return f}},e.prototype.show=function(a){return this.applyStyle(a),a.className=a.className+" "+this.config.animateClass,null!=this.config.callback&&this.config.callback(a),this.util().emitEvent(a,this.wowEvent),this.util().addEvent(a,"animationend",this.resetAnimation),this.util().addEvent(a,"oanimationend",this.resetAnimation),this.util().addEvent(a,"webkitAnimationEnd",this.resetAnimation),this.util().addEvent(a,"MSAnimationEnd",this.resetAnimation),a},e.prototype.applyStyle=function(a,b){var c,d,e;return d=a.getAttribute("data-wow-duration"),c=a.getAttribute("data-wow-delay"),e=a.getAttribute("data-wow-iteration"),this.animate(function(f){return function(){return f.customStyle(a,b,d,c,e)}}(this))},e.prototype.animate=function(){return"requestAnimationFrame"in window?function(a){return window.requestAnimationFrame(a)}:function(a){return a()}}(),e.prototype.resetStyle=function(){var a,b,c,d,e;for(d=this.boxes,e=[],b=0,c=d.length;c>b;b++)a=d[b],e.push(a.style.visibility="visible");return e},e.prototype.resetAnimation=function(a){var b;return a.type.toLowerCase().indexOf("animationend")>=0?(b=a.target||a.srcElement,b.className=b.className.replace(this.config.animateClass,"").trim()):void 0},e.prototype.customStyle=function(a,b,c,d,e){return b&&this.cacheAnimationName(a),a.style.visibility=b?"hidden":"visible",c&&this.vendorSet(a.style,{animationDuration:c}),d&&this.vendorSet(a.style,{animationDelay:d}),e&&this.vendorSet(a.style,{animationIterationCount:e}),this.vendorSet(a.style,{animationName:b?"none":this.cachedAnimationName(a)}),a},e.prototype.vendors=["moz","webkit"],e.prototype.vendorSet=function(a,b){var c,d,e,f;d=[];for(c in b)e=b[c],a[""+c]=e,d.push(function(){var b,d,g,h;for(g=this.vendors,h=[],b=0,d=g.length;d>b;b++)f=g[b],h.push(a[""+f+c.charAt(0).toUpperCase()+c.substr(1)]=e);return h}.call(this));return d},e.prototype.vendorCSS=function(a,b){var c,e,f,g,h,i;for(h=d(a),g=h.getPropertyCSSValue(b),f=this.vendors,c=0,e=f.length;e>c;c++)i=f[c],g=g||h.getPropertyCSSValue("-"+i+"-"+b);return g},e.prototype.animationName=function(a){var b;try{b=this.vendorCSS(a,"animation-name").cssText}catch(c){b=d(a).getPropertyValue("animation-name")}return"none"===b?"":b},e.prototype.cacheAnimationName=function(a){return this.animationNameCache.set(a,this.animationName(a))},e.prototype.cachedAnimationName=function(a){return this.animationNameCache.get(a)},e.prototype.scrollHandler=function(){return this.scrolled=!0},e.prototype.scrollCallback=function(){var a;return!this.scrolled||(this.scrolled=!1,this.boxes=function(){var b,c,d,e;for(d=this.boxes,e=[],b=0,c=d.length;c>b;b++)a=d[b],a&&(this.isVisible(a)?this.show(a):e.push(a));return e}.call(this),this.boxes.length||this.config.live)?void 0:this.stop()},e.prototype.offsetTop=function(a){for(var b;void 0===a.offsetTop;)a=a.parentNode;for(b=a.offsetTop;a=a.offsetParent;)b+=a.offsetTop;return b},e.prototype.isVisible=function(a){var b,c,d,e,f;return c=a.getAttribute("data-wow-offset")||this.config.offset,f=this.config.scrollContainer&&this.config.scrollContainer.scrollTop||window.pageYOffset,e=f+Math.min(this.element.clientHeight,this.util().innerHeight())-c,d=this.offsetTop(a),b=d+a.clientHeight,e>=d&&b>=f},e.prototype.util=function(){return null!=this._util?this._util:this._util=new b},e.prototype.disabled=function(){return!this.config.mobile&&this.util().isMobile(navigator.userAgent)},e}()}).call(this);
\ No newline at end of file
+* Copyright (c) 2016 Matthieu Aussaguel;*/'use strict';var _createClass=function(){function defineProperties(target,props){for(var i=0;i<props.length;i++){var descriptor=props[i];descriptor.enumerable=descriptor.enumerable||false;descriptor.configurable=true;if("value"in descriptor)descriptor.writable=true;Object.defineProperty(target,descriptor.key,descriptor);}}return function(Constructor,protoProps,staticProps){if(protoProps)defineProperties(Constructor.prototype,protoProps);if(staticProps)defineProperties(Constructor,staticProps);return Constructor;};}();function _classCallCheck(instance,Constructor){if(!(instance instanceof Constructor)){throw new TypeError("Cannot call a class as a function");}}
+(function(){var MutationObserver,Util,WeakMap,getComputedStyle,getComputedStyleRX,indexOf=[].indexOf;Util=function(){function Util(){_classCallCheck(this,Util);}
+_createClass(Util,[{key:'extend',value:function extend(custom,defaults){var key,value;for(key in defaults){value=defaults[key];if(custom[key]==null){custom[key]=value;}}
+return custom;}},{key:'isMobile',value:function isMobile(agent){return(/Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(agent));}},{key:'createEvent',value:function createEvent(event){var bubble=arguments.length>1&&arguments[1]!==undefined?arguments[1]:false;var cancel=arguments.length>2&&arguments[2]!==undefined?arguments[2]:false;var detail=arguments.length>3&&arguments[3]!==undefined?arguments[3]:null;var customEvent;if(document.createEvent!=null){customEvent=document.createEvent('CustomEvent');customEvent.initCustomEvent(event,bubble,cancel,detail);}else if(document.createEventObject!=null){customEvent=document.createEventObject();customEvent.eventType=event;}else{customEvent.eventName=event;}
+return customEvent;}},{key:'emitEvent',value:function emitEvent(elem,event){if(elem.dispatchEvent!=null){return elem.dispatchEvent(event);}else if(event in(elem!=null)){return elem[event]();}else if('on'+event in(elem!=null)){return elem['on'+event]();}}},{key:'addEvent',value:function addEvent(elem,event,fn){if(elem.addEventListener!=null){return elem.addEventListener(event,fn,false);}else if(elem.attachEvent!=null){return elem.attachEvent('on'+event,fn);}else{return elem[event]=fn;}}},{key:'removeEvent',value:function removeEvent(elem,event,fn){if(elem.removeEventListener!=null){return elem.removeEventListener(event,fn,false);}else if(elem.detachEvent!=null){return elem.detachEvent('on'+event,fn);}else{return delete elem[event];}}},{key:'innerHeight',value:function innerHeight(){if('innerHeight'in window){return window.innerHeight;}else{return document.documentElement.clientHeight;}}}]);return Util;}();WeakMap=this.WeakMap||this.MozWeakMap||(WeakMap=function(){function WeakMap(){_classCallCheck(this,WeakMap);this.keys=[];this.values=[];}
+_createClass(WeakMap,[{key:'get',value:function get(key){var i,item,j,len,ref;ref=this.keys;for(i=j=0,len=ref.length;j<len;i=++j){item=ref[i];if(item===key){return this.values[i];}}}},{key:'set',value:function set(key,value){var i,item,j,len,ref;ref=this.keys;for(i=j=0,len=ref.length;j<len;i=++j){item=ref[i];if(item===key){this.values[i]=value;return;}}
+this.keys.push(key);return this.values.push(value);}}]);return WeakMap;}());MutationObserver=this.MutationObserver||this.WebkitMutationObserver||this.MozMutationObserver||(MutationObserver=function(){var MutationObserver=function(){function MutationObserver(){_classCallCheck(this,MutationObserver);if(typeof console!=="undefined"&&console!==null){console.warn('MutationObserver is not supported by your browser.');}
+if(typeof console!=="undefined"&&console!==null){console.warn('WOW.js cannot detect dom mutations, please call .sync() after loading new content.');}}
+_createClass(MutationObserver,[{key:'observe',value:function observe(){}}]);return MutationObserver;}();;MutationObserver.notSupported=true;return MutationObserver;}.call(this));getComputedStyle=this.getComputedStyle||function(el,pseudo){this.getPropertyValue=function(prop){var ref;if(prop==='float'){prop='styleFloat';}
+if(getComputedStyleRX.test(prop)){prop.replace(getComputedStyleRX,function(_,_char){return _char.toUpperCase();});}
+return((ref=el.currentStyle)!=null?ref[prop]:void 0)||null;};return this;};getComputedStyleRX=/(\-([a-z]){1})/g;this.WOW=function(){var WOW=function(){function WOW(){var options=arguments.length>0&&arguments[0]!==undefined?arguments[0]:{};_classCallCheck(this,WOW);this.start=this.start.bind(this);this.resetAnimation=this.resetAnimation.bind(this);this.scrollHandler=this.scrollHandler.bind(this);this.scrollCallback=this.scrollCallback.bind(this);this.scrolled=true;this.config=this.util().extend(options,this.defaults);if(options.scrollContainer!=null){this.config.scrollContainer=document.querySelector(options.scrollContainer);}
+this.animationNameCache=new WeakMap();this.wowEvent=this.util().createEvent(this.config.boxClass);}
+_createClass(WOW,[{key:'init',value:function init(){var ref;this.element=window.document.documentElement;if((ref=document.readyState)==="interactive"||ref==="complete"){this.start();}else{this.util().addEvent(document,'DOMContentLoaded',this.start);}
+return this.finished=[];}},{key:'start',value:function start(){var _this=this;var box,j,len,ref;this.stopped=false;this.boxes=function(){var j,len,ref,results;ref=this.element.querySelectorAll('.'+this.config.boxClass);results=[];for(j=0,len=ref.length;j<len;j++){box=ref[j];results.push(box);}
+return results;}.call(this);this.all=function(){var j,len,ref,results;ref=this.boxes;results=[];for(j=0,len=ref.length;j<len;j++){box=ref[j];results.push(box);}
+return results;}.call(this);if(this.boxes.length){if(this.disabled()){this.resetStyle();}else{ref=this.boxes;for(j=0,len=ref.length;j<len;j++){box=ref[j];this.applyStyle(box,true);}}}
+if(!this.disabled()){this.util().addEvent(this.config.scrollContainer||window,'scroll',this.scrollHandler);this.util().addEvent(window,'resize',this.scrollHandler);this.interval=setInterval(this.scrollCallback,50);}
+if(this.config.live){return new MutationObserver(function(records){var k,len1,node,record,results;results=[];for(k=0,len1=records.length;k<len1;k++){record=records[k];results.push(function(){var l,len2,ref1,results1;ref1=record.addedNodes||[];results1=[];for(l=0,len2=ref1.length;l<len2;l++){node=ref1[l];results1.push(this.doSync(node));}
+return results1;}.call(_this));}
+return results;}).observe(document.body,{childList:true,subtree:true});}}},{key:'stop',value:function stop(){this.stopped=true;this.util().removeEvent(this.config.scrollContainer||window,'scroll',this.scrollHandler);this.util().removeEvent(window,'resize',this.scrollHandler);if(this.interval!=null){return clearInterval(this.interval);}}},{key:'sync',value:function sync(element){if(MutationObserver.notSupported){return this.doSync(this.element);}}},{key:'doSync',value:function doSync(element){var box,j,len,ref,results;if(element==null){element=this.element;}
+if(element.nodeType!==1){return;}
+element=element.parentNode||element;ref=element.querySelectorAll('.'+this.config.boxClass);results=[];for(j=0,len=ref.length;j<len;j++){box=ref[j];if(indexOf.call(this.all,box)<0){this.boxes.push(box);this.all.push(box);if(this.stopped||this.disabled()){this.resetStyle();}else{this.applyStyle(box,true);}
+results.push(this.scrolled=true);}else{results.push(void 0);}}
+return results;}},{key:'show',value:function show(box){this.applyStyle(box);box.className=box.className+' '+this.config.animateClass;if(this.config.callback!=null){this.config.callback(box);}
+this.util().emitEvent(box,this.wowEvent);this.util().addEvent(box,'animationend',this.resetAnimation);this.util().addEvent(box,'oanimationend',this.resetAnimation);this.util().addEvent(box,'webkitAnimationEnd',this.resetAnimation);this.util().addEvent(box,'MSAnimationEnd',this.resetAnimation);return box;}},{key:'applyStyle',value:function applyStyle(box,hidden){var _this2=this;var delay,duration,iteration;duration=box.getAttribute('data-wow-duration');delay=box.getAttribute('data-wow-delay');iteration=box.getAttribute('data-wow-iteration');return this.animate(function(){return _this2.customStyle(box,hidden,duration,delay,iteration);});}},{key:'resetStyle',value:function resetStyle(){var box,j,len,ref,results;ref=this.boxes;results=[];for(j=0,len=ref.length;j<len;j++){box=ref[j];results.push(box.style.opacity=1);}
+return results;}},{key:'resetAnimation',value:function resetAnimation(event){var target;if(event.type.toLowerCase().indexOf('animationend')>=0){target=event.target||event.srcElement;return target.className=target.className.replace(this.config.animateClass,'').trim();}}},{key:'customStyle',value:function customStyle(box,hidden,duration,delay,iteration){if(hidden){this.cacheAnimationName(box);}
+box.style.opacity=0?0:1;if(duration){this.vendorSet(box.style,{animationDuration:duration});}
+if(delay){this.vendorSet(box.style,{animationDelay:delay});}
+if(iteration){this.vendorSet(box.style,{animationIterationCount:iteration});}
+this.vendorSet(box.style,{animationName:hidden?'none':this.cachedAnimationName(box)});return box;}},{key:'vendorSet',value:function vendorSet(elem,properties){var name,results,value,vendor;results=[];for(name in properties){value=properties[name];elem[''+name]=value;results.push(function(){var j,len,ref,results1;ref=this.vendors;results1=[];for(j=0,len=ref.length;j<len;j++){vendor=ref[j];results1.push(elem[''+vendor+name.charAt(0).toUpperCase()+name.substr(1)]=value);}
+return results1;}.call(this));}
+return results;}},{key:'vendorCSS',value:function vendorCSS(elem,property){var j,len,ref,result,style,vendor;style=getComputedStyle(elem);result=style.getPropertyCSSValue(property);ref=this.vendors;for(j=0,len=ref.length;j<len;j++){vendor=ref[j];result=result||style.getPropertyCSSValue('-'+vendor+'-'+property);}
+return result;}},{key:'animationName',value:function animationName(box){var animationName;try{animationName=this.vendorCSS(box,'animation-name').cssText;}catch(error){animationName=getComputedStyle(box).getPropertyValue('animation-name');}
+if(animationName==='none'){return'';}else{return animationName;}}},{key:'cacheAnimationName',value:function cacheAnimationName(box){return this.animationNameCache.set(box,this.animationName(box));}},{key:'cachedAnimationName',value:function cachedAnimationName(box){return this.animationNameCache.get(box);}},{key:'scrollHandler',value:function scrollHandler(){return this.scrolled=true;}},{key:'scrollCallback',value:function scrollCallback(){var box;if(this.scrolled){this.scrolled=false;this.boxes=function(){var j,len,ref,results;ref=this.boxes;results=[];for(j=0,len=ref.length;j<len;j++){box=ref[j];if(!box){continue;}
+if(this.isVisible(box)){this.show(box);continue;}
+results.push(box);}
+return results;}.call(this);if(!(this.boxes.length||this.config.live)){return this.stop();}}}},{key:'offsetTop',value:function offsetTop(element){var top;while(element.offsetTop===void 0){element=element.parentNode;}
+top=element.offsetTop;while(element=element.offsetParent){top+=element.offsetTop;}
+return top;}},{key:'isVisible',value:function isVisible(box){var bottom,offset,top,viewBottom,viewTop;offset=box.getAttribute('data-wow-offset')||this.config.offset;viewTop=this.config.scrollContainer&&this.config.scrollContainer.scrollTop||window.pageYOffset;viewBottom=viewTop+Math.min(this.element.clientHeight,this.util().innerHeight())-offset;top=this.offsetTop(box);bottom=top+box.clientHeight;return top<=viewBottom&&bottom>=viewTop;}},{key:'util',value:function util(){return this._util!=null?this._util:this._util=new Util();}},{key:'disabled',value:function disabled(){return!this.config.mobile&&this.util().isMobile(navigator.userAgent);}}]);return WOW;}();;WOW.prototype.defaults={boxClass:'wow',animateClass:'animated',offset:0,mobile:true,live:true,callback:null,scrollContainer:null};WOW.prototype.animate=function(){if('requestAnimationFrame'in window){return function(callback){return window.requestAnimationFrame(callback);};}else{return function(callback){return callback();};}}();WOW.prototype.vendors=["moz","webkit"];return WOW;}.call(this);}).call(undefined);
\ No newline at end of file
diff --git a/src/wow.coffee b/src/wow.coffee
old mode 100644
new mode 100755
index 7acea88..ba35354
--- a/src/wow.coffee
+++ b/src/wow.coffee
@@ -202,7 +202,7 @@ class @WOW
   )()
 
   resetStyle: ->
-    box.style.visibility = 'visible' for box in @boxes
+    box.style.opacity = 1 for box in @boxes
 
   resetAnimation: (event) =>
     if event.type.toLowerCase().indexOf('animationend') >= 0
@@ -211,7 +211,7 @@ class @WOW
 
   customStyle: (box, hidden, duration, delay, iteration) ->
     @cacheAnimationName(box) if hidden
-    box.style.visibility = if hidden then 'hidden' else 'visible'
+    box.style.opacity = if 0 then 0 else 1
 
     @vendorSet box.style, animationDuration: duration if duration
     @vendorSet box.style, animationDelay: delay if delay