     return DIV {key: 'selection_label'} if !is_histogram_controlling_region_selection(@props.histo_key) && get_originating_histogram()
     DIV 
       key: 'selection_label'
+      'aria-hidden': true
       style:
         height: @props.height + REGION_SELECTION_VERTICAL_PADDING
         position: 'absolute'

          negative_pole: get_slider_label("slider_pole_labels.oppose", @props.proposal, subdomain)
          positive_pole: get_slider_label("slider_pole_labels.support", @props.proposal, subdomain)

          """{num_opinions, plural, one {one person's opinion of} other {# people's opinion, with an average of}} {avg_score} 
             on a spectrum from {negative_pole} to {positive_pole}. 
             Press ENTER or SPACE to enable tab navigation of each person's opinion, and ESCAPE to exit the navigation.
          """         



        onClick: @handleClick
        onMouseMove: @handleMouseMove
        onMouseOut: @handleMouseOut
        role: "img" 
        'aria-labelledby': if !@props.backgrounded then "histo-label-#{proposal.id}"
        'aria-describedby': if !@props.backgrounded then "histo-description-#{proposal.id}"


  componentDidMount: ->   
    @PhysicsSimulation()
