thickness: Number

Sets the thickness of the stripLine in pixels.

Default: 1
Example: 2,4,5,6 
var  chart =  new  CanvasJS.Chart("container",
{
 .
 .
axisX:{
    stripLines: [{
        .
        thickness:3,
        .
    }]
},
 .
 .
});
chart.render();
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