overlay.typeString(default: "custom")
Available options are image and swiss. When set to image you have to specify the url source of the image. If set to swiss a Swiss QR Code is created.
Example
<div id="qrCode"></div>
<script>
$("#qrCode").kendoQRCode({
value: "https://demos.telerik.com/kendo-ui/content/shared/images/site/kendoka-cta.svg",
overlay:{
type: "swiss"
},
errorCorrection: "M"
});
</script>