showOnTop: Boolean

stripLine is displayed on top of dataPoints when showOnTop is set to true.

Default: false
Example: true, false 
var  chart =  new  CanvasJS.Chart("container",
{
 .
 .
axisY:{
    stripLines: [{
        .
        showOnTop: true,
        .
    }]
},
 .
 .
});
chart.render();
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