cornerRadius: Number

To display rounded borders around the title, set the cornerRadius of title. Higher the value, more rounded are the corners.

Default: 0
Options: 5,8 ..
var  chart =  new  CanvasJS.Chart("container",
{
 .
 .
 title:{
  cornerRadius: 4,
 },
 .
 .
});
chart.render();


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