gridDashType: String

Sets the Dash Type for grid lines on axisY.

Other Supported Dash Types:

• “solid”
• “shortDash”
• “shortDot”
• “shortDashDot”
• “shortDashDotDot”
• “dot”
• “dash”
• “dashDot”
• “longDash”
• “longDashDot”
• “longDashDotDot”

var  chart =  new  CanvasJS.Chart("container",
{
 .
 .
axisY:{

     gridDashType: "dot"
},
 .
 .
});
chart.render();