How can i bind event to a chart

in chart.js doc, [BarChart prototype-methods](http://www.chartjs.org/docs/#bar-chart-prototype-methods), i can bind click event listener to the canvas and get the clicked bar via _chart instance_'s methods. But in react, in this component, i can not access to the chart instance, even i do not know where is the canvas is... so how can i bind event listener and get the bar clicked?
