html5 canvas - Extend chart.js horizontal bar graph to include a vertical line -

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i'm trying add vertical line @ set point of horizontal bar chart. examples i've found not seem apply charts.js 2. if create new chart type , use horizontalbar draw method no modifications, chart won't draw.

chart.controllers.horizontalbarwithline = chart.controllers.horizontalbar.extend({     draw: function () {         chart.controllers.horizontalbar.prototype.draw.apply(this, arguments);     } });

can explain how extend chart?

here's current attemp: https://jsfiddle.net/dwelch/6f1gfog2/

please see answer question. think looking for:

how draw vertical line on horizontal bar chart chartjs?


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