diff --git a/README.md b/README.md
index 868e661..32327bd 100644
--- a/README.md
+++ b/README.md
@@ -502,7 +502,7 @@ Other attributes are:
### Support Polymer
```html
-
+
diff --git a/Sortable.min.js b/Sortable.min.js
index 066d0ee..7e8099b 100644
--- a/Sortable.min.js
+++ b/Sortable.min.js
@@ -1,2 +1,2 @@
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d,f=this,h=f.el,k=f.options,m=h.ownerDocument;c&&!t&&c.parentNode===h&&(H=a,x=h,t=c,u=t.parentNode,y=t.nextSibling,G=k.group,this._lastX=(b||a).clientX,this._lastY=(b||a).clientY,d=function(){f._disableDelayedDrag(),t.draggable=!0,g(t,f.options.chosenClass,!0),f._triggerDragStart(b),j(f,x,"choose",t,x,E)},k.ignore.split(",").forEach(function(a){i(t,a.trim(),l)}),e(m,"mouseup",f._onDrop),e(m,"touchend",f._onDrop),e(m,"touchcancel",f._onDrop),k.delay?(e(m,"mouseup",f._disableDelayedDrag),e(m,"touchend",f._disableDelayedDrag),e(m,"touchcancel",f._disableDelayedDrag),e(m,"mousemove",f._disableDelayedDrag),e(m,"touchmove",f._disableDelayedDrag),f._dragStartTimer=setTimeout(d,k.delay)):d())},_disableDelayedDrag:function(){var a=this.el.ownerDocument;clearTimeout(this._dragStartTimer),f(a,"mouseup",this._disableDelayedDrag),f(a,"touchend",this._disableDelayedDrag),f(a,"touchcancel",this._disableDelayedDrag),f(a,"mousemove",this._disableDelayedDrag),f(a,"touchmove",this._disableDelayedDrag)},_triggerDragStart:function(a){a?(H={target:t,clientX:a.clientX,clientY:a.clientY},this._onDragStart(H,"touch")):this.nativeDraggable?(e(t,"dragend",this),e(x,"dragstart",this._onDragStart)):this._onDragStart(H,!0);try{O.selection?O.selection.empty():window.getSelection().removeAllRanges()}catch(b){}},_dragStarted:function(){x&&t&&(g(t,this.options.ghostClass,!0),a.active=this,j(this,x,"start",t,x,E))},_emulateDragOver:function(){if(I){if(this._lastX===I.clientX&&this._lastY===I.clientY)return;this._lastX=I.clientX,this._lastY=I.clientY,R||h(v,"display","none");var a=O.elementFromPoint(I.clientX,I.clientY),b=a,c=" "+this.options.group.name,d=V.length;if(b)do{if(b[M]&&b[M].options.groups.indexOf(c)>-1){for(;d--;)V[d]({clientX:I.clientX,clientY:I.clientY,target:a,rootEl:b});break}a=b}while(b=b.parentNode);R||h(v,"display","")}},_onTouchMove:function(b){if(H){var c=this.options,d=c.fallbackTolerance,e=b.touches?b.touches[0]:b,f=e.clientX-H.clientX,g=e.clientY-H.clientY,i=b.touches?"translate3d("+f+"px,"+g+"px,0)":"translate("+f+"px,"+g+"px)";if(!a.active){if(d&&U(T(e.clientX-this._lastX),T(e.clientY-this._lastY))t.offsetWidth,F=d.offsetHeight>t.offsetHeight,H=(A?(a.clientX-r.left)/s:(a.clientY-r.top)/z)>.5,I=d.nextElementSibling,K=k(x,g,t,e,d,r);if(K!==!1){if(S=!0,setTimeout(m,30),b(o),1===K||-1===K)q=1===K;else if(A){var L=t.offsetTop,N=d.offsetTop;q=L===N?d.previousElementSibling===t&&!E||H&&E:d.previousElementSibling===t||t.previousElementSibling===d?(a.clientY-r.top)/z>.5:N>L}else q=I!==t&&!F||H&&F;t.contains(g)||(q&&!I?g.appendChild(t):d.parentNode.insertBefore(t,q?I:d)),u=t.parentNode,this._animate(e,t),this._animate(r,d)}}}},_animate:function(a,b){var c=this.options.animation;if(c){var d=b.getBoundingClientRect();h(b,"transition","none"),h(b,"transform","translate3d("+(a.left-d.left)+"px,"+(a.top-d.top)+"px,0)"),b.offsetWidth,h(b,"transition","all "+c+"ms"),h(b,"transform","translate3d(0,0,0)"),clearTimeout(b.animated),b.animated=setTimeout(function(){h(b,"transition",""),h(b,"transform",""),b.animated=!1},c)}},_offUpEvents:function(){var a=this.el.ownerDocument;f(O,"touchmove",this._onTouchMove),f(a,"mouseup",this._onDrop),f(a,"touchend",this._onDrop),f(a,"touchcancel",this._onDrop)},_onDrop:function(b){var c=this.el,d=this.options;clearInterval(this._loopId),clearInterval(K.pid),clearTimeout(this._dragStartTimer),f(O,"mousemove",this._onTouchMove),this.nativeDraggable&&(f(O,"drop",this),f(c,"dragstart",this._onDragStart)),this._offUpEvents(),b&&(J&&(b.preventDefault(),!d.dropBubble&&b.stopPropagation()),v&&v.parentNode.removeChild(v),t&&(this.nativeDraggable&&f(t,"dragend",this),l(t),g(t,this.options.ghostClass,!1),g(t,this.options.chosenClass,!1),x!==u?(F=p(t,d.draggable),F>=0&&(j(null,u,"sort",t,x,E,F),j(this,x,"sort",t,x,E,F),j(null,u,"add",t,x,E,F),j(this,x,"remove",t,x,E,F))):(w&&w.parentNode.removeChild(w),t.nextSibling!==y&&(F=p(t,d.draggable),F>=0&&(j(this,x,"update",t,x,E,F),j(this,x,"sort",t,x,E,F)))),a.active&&((null===F||-1===F)&&(F=E),j(this,x,"end",t,x,E,F),this.save())),x=t=u=v=y=w=z=A=H=I=J=F=B=C=G=a.active=null)},handleEvent:function(a){var b=a.type;"dragover"===b||"dragenter"===b?t&&(this._onDragOver(a),d(a)):("drop"===b||"dragend"===b)&&this._onDrop(a)},toArray:function(){for(var a,b=[],d=this.el.children,e=0,f=d.length,g=this.options;f>e;e++)a=d[e],c(a,g.draggable,this.el)&&b.push(a.getAttribute(g.dataIdAttr)||o(a));return b},sort:function(a){var b={},d=this.el;this.toArray().forEach(function(a,e){var f=d.children[e];c(f,this.options.draggable,d)&&(b[a]=f)},this),a.forEach(function(a){b[a]&&(d.removeChild(b[a]),d.appendChild(b[a]))})},save:function(){var a=this.options.store;a&&a.set(this)},closest:function(a,b){return c(a,b||this.options.draggable,this.el)},option:function(a,b){var c=this.options;return void 0===b?c[a]:(c[a]=b,void("group"===a&&X(c)))},destroy:function(){var a=this.el;a[M]=null,f(a,"mousedown",this._onTapStart),f(a,"touchstart",this._onTapStart),this.nativeDraggable&&(f(a,"dragover",this),f(a,"dragenter",this)),Array.prototype.forEach.call(a.querySelectorAll("[draggable]"),function(a){a.removeAttribute("draggable")}),V.splice(V.indexOf(this._onDragOver),1),this._onDrop(),this.el=a=null}},a.utils={on:e,off:f,css:h,find:i,is:function(a,b){return!!c(a,b,a)},extend:s,throttle:r,closest:c,toggleClass:g,index:p},a.create=function(b,c){return new a(b,c)},a.version="1.4.2",a});
\ No newline at end of file
diff --git a/knockout-sortable.js b/knockout-sortable.js
index 143e94b..4a280a3 100644
--- a/knockout-sortable.js
+++ b/knockout-sortable.js
@@ -78,7 +78,7 @@
moveItem(itemVM, removeOperation.collection, addOperation.collection, addOperation.event.clone, addOperation.event);
}
},
- // Moves an item from the "to" collection to the "from" collection, these
+ // Moves an item from the "from" collection to the "to" collection, these
// can be references to the same collection which means it's a sort.
// clone indicates if we should move or copy the item into the new collection
moveItem = function (itemVM, from, to, clone, e) {
@@ -89,11 +89,12 @@
originalIndex = fromArray.indexOf(itemVM),
newIndex = e.newIndex;
- if (e.item.previousElementSibling)
- {
- newIndex = fromArray.indexOf(ko.dataFor(e.item.previousElementSibling));
- if (originalIndex > newIndex)
- newIndex = newIndex + 1;
+ // We have to find out the actual desired index of the to array,
+ // as this might be a computed array. We could otherwise potentially
+ // drop an item above the 3rd visible item, but the 2nd visible item
+ // has an actual index of 5.
+ if (e.item.previousElementSibling) {
+ newIndex = to().indexOf(ko.dataFor(e.item.previousElementSibling)) + 1;
}
// Remove sortables "unbound" element
diff --git a/knockout/example.html b/knockout/example.html
new file mode 100644
index 0000000..a872d94
--- /dev/null
+++ b/knockout/example.html
@@ -0,0 +1,127 @@
+
+
+
+
+
+
+
+
+
+
+
+
+
+
Sortable observable
+
+
+
+
Sortable observable mirrored
+
+
+
+
+
+
+
+
+
+
Sortable underlaying computed
+
+
+
+
+
+
+
+
+
Draggable observable
+
+
+
+
Draggable observable mirrored
+
+
+
+
+
+
+
+
+
+
Draggable computed mirrored
+
+
+
+
+