fontStyle: String

Sets the Font Style of ToolTip Content. It can be set to one of the below options.

Default: “italic”
Example: “normal”, “italic” , “oblique”

var  chart =  new  CanvasJS.Chart("container",
   fontStyle: "italic",


Try it Yourself by Editing the Code below.

  Also See:    

In order to provide better support, we have closed the comments and switched completely to our Forums.
If you have any questions, please feel free to ask in our forums.