anchor.diff:                  Canvas.Repetition
                   Canvas.TextAlign
                   Canvas.TextBaseline
  +                Canvas.TextDirection
                   Canvas.TextMetrics
                   Elements.CanvasElement
                   Elements.HTMLAudioElement
  
positive.code:             "onloadeddata" =@ f
              "onloadedmetadata" =@ f
              "onloadstart" =@ f
              "onmessage" =@ f
              "onmousedown" =@ f
              "onmousemove" =@ f
              "onmouseout" =@ f
              "onmouseover" =@ f
              "onmouseup" =@ f
              "onmousewheel" =@ f
              "onoffline" =@ f
              "ononline" =@ f
  
negative.code:             "ondblclick" =@ f
              "ondrag" =@ f
              "ondragend" =@ f
              "ondragexit" =@ f
              "ondragenter" =@ f
              "ondragleave" =@ f
              "ondragover" =@ f
  