nl_tokens: Note : we register mousemove / mouseup on document to allow some leeway for events to move outside of the chart . Interaction model events get registered on the canvas which is too small to allow this .
pl_tokens: function ( event ) { if ( context . isZooming ) { // When the mouse moves >200px from the chart edge, cancel the zoom. var d = distanceFromChart ( <mask> , g ) ; if ( d < DRAG_EDGE_MARGIN ) { DygraphInteraction . moveZoom ( event , g , context ) ; } else { if ( context . dragEndX !== null ) { context . dragEndX = null ; context . dragEndY = null ; g . clearZoomRect_ ( ) ; } } } else if ( context . isPanning ) { DygraphInteraction . movePan ( event , g , context ) ; } }