Prasanna,
Exporting Chart data to excel or pdf is not available as an inbuilt feature as of now. However, you can can export chart to pdf using jsPDF as shown in the below code snippet.
$("#exportButton").click(function(){
var pdf = new jsPDF();
pdf.addImage(dataURL, 'JPEG', 0, 0);
pdf.save("download.pdf");
});
Please take a look at this JSFiddle for an example on exporting chart to pdf using jsPDF.
For exporting into Excel you can use libraries like excelbuilder or SheetJS. Please take a look at this JSFiddle for exporting chart data to excel using SheetJS.
—-
Sanjoy Debnath
Team CanvasJS