Bump version

dist/moveTo.js

@@ -1,6 +1,6 @@
 /*!
  * MoveTo - A lightweight scroll animation javascript library without any dependency.
- * Version 1.6.1 (14-09-2017 18:01)
+ * Version 1.7.0 (01-10-2017 14:12)
  * Licensed under MIT
  * Copyright 2017 Hasan Aydoğdu <hsnaydd@gmail.com>
  */
@@ -32,28 +32,6 @@ var MoveTo = function () {
     return -c * (t * t * t * t - 1) + b;
   }
 
-  /**
-     * Returns html element's top and left offset
-     * @param  {HTMLElement} elem - Element
-     * @return {object} Element top and left offset
-     */
-  function getOffsetSum(elem) {
-    if (typeof elem.getBoundingClientRect == 'function') {
-      return elem.getBoundingClientRect();
-    } else {
-      var top = 0;
-      var left = 0;
-      while (elem) {
-        top += elem.offsetTop;
-        left += elem.offsetLeft;
-        elem = elem.offsetParent;
-      }
-      return {
-        top: top, left: left };
-
-    }
-  }
-
   /**
      * Merge two object
      *
@@ -139,12 +117,16 @@ var MoveTo = function () {
 
     options = mergeObject(this.options, options);
 
-    var to = typeof target === 'number' ? target : getOffsetSum(target).top;
+    var distance = typeof target === 'number' ? target : target.getBoundingClientRect().top;
     var from = window.pageYOffset;
-    to -= options.tolerance;
-    var change = to - from;
     var startTime = null;
     var lastPageYOffset = void 0;
+    distance -= options.tolerance;
+
+    // if distance is `0`, it means to back to the top
+    if (distance === 0) {
+      distance -= from;
+    }
 
     // rAF loop
     var loop = function loop(currentTime) {
@@ -161,24 +143,24 @@ var MoveTo = function () {
 
       if (lastPageYOffset) {
         if (
-        change > 0 && lastPageYOffset > currentPageYOffset ||
-        change < 0 && lastPageYOffset < currentPageYOffset)
+        distance > 0 && lastPageYOffset > currentPageYOffset ||
+        distance < 0 && lastPageYOffset < currentPageYOffset)
         {
           return options.callback(target);
         }
       }
       lastPageYOffset = currentPageYOffset;
 
       var val = _this2.easeFunctions[options.easing](
-      timeElapsed, from, change, options.duration);
+      timeElapsed, from, distance, options.duration);
 
 
       window.scroll(0, val);
 
       if (timeElapsed < options.duration) {
         window.requestAnimationFrame(loop);
       } else {
-        window.scroll(0, to);
+        window.scroll(0, distance + from);
         options.callback(target);
       }
     };

package.json

@@ -1,6 +1,6 @@
 {
   "name": "moveto",
-  "version": "1.6.1",
+  "version": "1.7.0",
   "description": "A lightweight scroll animation javascript library without any dependency.",
   "main": "dist/moveTo.js",
   "scripts": {