Chartjs-Chartjs add and remove data

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I have checked your code, your problem is about adding data,so I fixed it, please in adding function in your loop I mean that.

for (var index = 0; index < barChartData.datasets.length; ++index) {
                barChartData.datasets[0].data[10] = 500;
                barChartData.datasets[1].data[10] = 200;
            }

replace those

barChartData.datasets[0].data[10] = 500;
barChartData.datasets[1].data[10] = 200;

with this

barChartData.datasets[index].data.push( Math.floor((Math.random() * 10) + 1) );

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