A fix in applying fit on initialization of the Timeline

lib/timeline/Range.js

@@ -128,13 +128,13 @@ Range.prototype.setRange = function(start, end, animate) {
         var now = new Date().valueOf();
         var time = now - initTime;
         var done = time > duration;
-        var s = done ? start : util.easeInOutQuad(time, initStart, _start, duration);
-        var e = done ? end   : util.easeInOutQuad(time, initEnd, _end, duration);
+        var s = (done || _start === null) ? _start : util.easeInOutQuad(time, initStart, _start, duration);
+        var e = (done || _end === null)   ? _end   : util.easeInOutQuad(time, initEnd, _end, duration);
 
         changed = me._applyRange(s, e);
         anyChanged = anyChanged || changed;
         if (changed) {
-          me.body.emitter.emit('rangechange', {start: new Date(s), end: new Date(e)});
+          me.body.emitter.emit('rangechange', {start: new Date(me.start), end: new Date(me.end)});
         }
 
         if (done) {

lib/timeline/Timeline.js

@@ -132,14 +132,16 @@ Timeline.prototype.setItems = function(items) {
   // set items
   this.itemsData = newDataSet;
   this.itemSet && this.itemSet.setItems(newDataSet);
+  if (initialLoad) {
+    if (this.options.start != undefined || this.options.end != undefined) {
+      var start = this.options.start != undefined ? this.options.start : null;
+      var end   = this.options.end != undefined   ? this.options.end : null;
 
-  if (initialLoad && ('start' in this.options || 'end' in this.options)) {
-    this.fit();
-
-    var start = ('start' in this.options) ? util.convert(this.options.start, 'Date') : null;
-    var end   = ('end' in this.options)   ? util.convert(this.options.end, 'Date') : null;
-
-    this.setWindow(start, end, false);
+      this.setWindow(start, end, {animate: false});
+    }
+    else {
+      this.fit({animate: false});
+    }
   }
 };