Chartjs-How can i implement chart.js destroy in my draw function

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You have 2 options, either fully recreate the chart by destroying it first:

const config = {}; // Fill with your config opbject

let chart = Chart.getChart('myChart'); // Pass the canvas ID

if (chart) {
  chart.destroy();
}

chart = new Chart('myChart', config);

or by updatingt the current chart instance:

const config = {}; // Fill with your config opbject

let chart = Chart.getChart('myChart'); // Pass the canvas ID

if (chart) {
  chart.data.labels = legend;
  chart.data.datasets[0].data = stats;
  chart.update();
} else {
  new Chart('myChart', config)
}

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