The Web appearance rendering type for checkboxes and radio buttons specifies that standard Web controls appearance with platform-native styling will be used.
window.onload = function(){
//DsPdfViewer.LicenseKey = "***key***";
let viewer = new DsPdfViewer("#viewer", {
fieldsAppearance: {
radioButton: "Web",
checkBoxButton: "Web"
}
});
viewer.addDefaultPanels();
viewer.toolbarLayout.viewer = {
"default": ["$navigation", "$zoom"],
"mobile": ["$navigation", "$zoom"]
};
viewer.zoomMode = 1;
viewer.open("/document-solutions/javascript-pdf-viewer/demos/product-bundles/assets/pdf/buttons-appearance.pdf");
}