Exporting chart data as CSV is not available as an in-built feature as of now. However, with few lines of code, you can achieve the same as shown in this JSFiddle. You can even use the export-canvasjs-chart-data-as-csv npm package to export chart data as CSV in Angular app. Please take a look at this Stackblitz project for an example of the same.
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Ananya Deka
Team CanvasJS