Oops fixing the overflow issue with the dots of BoxItems broke item selection.

dist/vis.css

@@ -143,9 +143,9 @@
 .vis.timeline .axis {
   position: absolute;
   width: 100%;
+  height: 0;
   left: 0;
-  top: 0;
-  overflow: hidden;
+  z-index: 1;
 }
 
 .vis.timeline  .foreground .group {

lib/timeline/component/ItemSet.js

@@ -368,7 +368,7 @@ ItemSet.prototype.show = function() {
 
   // show axis with dots
   if (!this.dom.axis.parentNode) {
-    this.body.dom.top.appendChild(this.dom.axis);
+    this.body.dom.backgroundVertical.appendChild(this.dom.axis);
   }
 
   // show labelset containing labels
@@ -524,7 +524,12 @@ ItemSet.prototype.redraw = function() {
   this.props.height = height;
 
   // reposition axis
-  this.dom.axis.style.height = this.body.domProps.background.height + 'px';
+
+  // reposition axis
+  this.dom.axis.style.top = asSize((orientation == 'top') ?
+      (this.body.domProps.top.height + this.body.domProps.border.top) :
+      (this.body.domProps.top.height + this.body.domProps.centerContainer.height));
+  this.dom.axis.style.left = '0';
 
   // check if this component is resized
   resized = this._isResized() || resized;

lib/timeline/component/css/itemset.css

@@ -17,9 +17,9 @@
 .vis.timeline .axis {
   position: absolute;
   width: 100%;
+  height: 0;
   left: 0;
-  top: 0;
-  overflow: hidden;
+  z-index: 1;
 }
 
 .vis.timeline  .foreground .group {

lib/timeline/component/item/BoxItem.js

@@ -206,7 +206,6 @@ BoxItem.prototype.repositionY = function() {
     line.style.top    = '0';
     line.style.height = (this.parent.top + this.top + 1) + 'px';
     line.style.bottom = '';
-    dot.style.top     = (this.parent.itemSet.props.top -this.props.dot.height / 2) + 'px';
   }
   else { // orientation 'bottom'
     var itemSetHeight = this.parent.itemSet.props.height; // TODO: this is nasty
@@ -215,8 +214,9 @@ BoxItem.prototype.repositionY = function() {
     box.style.top     = (this.parent.height - this.top - this.height || 0) + 'px';
     line.style.top    = (itemSetHeight - lineHeight) + 'px';
     line.style.bottom = '0';
-    dot.style.top     = (itemSetHeight - this.props.dot.height / 2) + 'px';
   }
+
+  dot.style.top = (-this.props.dot.height / 2) + 'px';
 };
 
 module.exports = BoxItem;