score:0

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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