Call onScroll with the current scrollTop/Left in ScrollbarComponent

src/editor-component.coffee

@@ -308,9 +308,10 @@ EditorCompont = React.createClass
       editor.selectLeft() if replaceLastCharacter
       editor.insertText(char)
 
-  onVerticalScroll: ->
-    scrollTop = @refs.verticalScrollbar.getDOMNode().scrollTop
-    return if @props.editor.getScrollTop() is scrollTop
+  onVerticalScroll: (scrollTop) ->
+    {editor} = @props
+
+    return if scrollTop is editor.getScrollTop()
 
     animationFramePending = @pendingScrollTop?
     @pendingScrollTop = scrollTop
@@ -319,9 +320,10 @@ EditorCompont = React.createClass
         @props.editor.setScrollTop(@pendingScrollTop)
         @pendingScrollTop = null
 
-  onHorizontalScroll: ->
-    scrollLeft = @refs.horizontalScrollbar.getDOMNode().scrollLeft
-    return if @props.editor.getScrollLeft() is scrollLeft
+  onHorizontalScroll: (scrollLeft) ->
+    {editor} = @props
+
+    return if scrollLeft is editor.getScrollLeft()
 
     animationFramePending = @pendingScrollLeft?
     @pendingScrollLeft = scrollLeft

src/scrollbar-component.coffee

@@ -7,9 +7,9 @@ ScrollbarComponent = React.createClass
   lastScrollLeft: null
 
   render: ->
-    {orientation, className, onScroll, scrollHeight, scrollWidth} = @props
+    {orientation, className, scrollHeight, scrollWidth} = @props
 
-    div {className, onScroll},
+    div {className, @onScroll},
       switch orientation
         when 'vertical'
           div className: 'scrollbar-content', style: {height: scrollHeight}
@@ -35,3 +35,13 @@ ScrollbarComponent = React.createClass
         unless scrollLeft is @lastScrollLeft
           node.scrollLeft = scrollLeft
           @lastScrollLeft = node.scrollLeft
+
+  onScroll: ->
+    {orientation, onScroll} = @props
+    node = @getDOMNode()
+
+    switch orientation
+      when 'vertical'
+        onScroll(node.scrollTop)
+      when 'horizontal'
+        onScroll(node.scrollLeft)