How to clear a chart from a canvas so that hover events cannot be triggered with Chart.js and JavaScript?

Sometimes, we want to clear a chart from a canvas so that hover events cannot be triggered with Chart.js and JavaScript.

In trhis article, we’ll look at how to clear a chart from a canvas so that hover events cannot be triggered with Chart.js and JavaScript.

How to clear a chart from a canvas so that hover events cannot be triggered with Chart.js and JavaScript?

To clear a chart from a canvas so that hover events cannot be triggered with Chart.js and JavaScript, we call the destroy method.

For instance, we write

let myPieChart = null;

const drawChart = (objChart, data) => {
  myPieChart?.destroy();
  const ctx = objChart.getContext("2d");
  myPieChart = new Chart(ctx).Pie(data, { animateScale: true });
};

to define the drawChart function.

In it, we call destroy on myPieChart to destroy the existing chart.

Then we get the context of the objChart canvas with getContext.

Then we we create a pie chart with Pie and set the returned chart object as the new value of myPieChart.

Conclusion

To clear a chart from a canvas so that hover events cannot be triggered with Chart.js and JavaScript, we call the destroy method.