score:0

you could wait until they add the property... or you could add a dynamic event handler like this.

$('#bar_container').on('hover','#bar_id',function(){
    $(this).css('border','1px solid #ffff00');
}

that way the someone hover the bar it will highlight in yellow event when the bar was created dynamically.

score:3

you can vote for that feature in highcharts here.

i created simple example for you, using renderer to add these shapes. note, that you should update these shapes in chart.events.redraw event with proper dimensions: http://jsfiddle.net/qwxj9d7o/


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