Hide a field based on the User Role in a Dialog

If you need to hide a field in a dialog based on User role i.e. user group, you can do it through an Ajax call-

$.ajax({
    type: "GET",
    url: "/libs/granite/security/currentuser.json.rw.userprops.json?props=declaredMemberOf",
    cache: false
}).done(function(data, textStatus, jqXHR) {
    var isMember = false;
    /* The Group ID for which the widget has to be disabled */
    var groupId = "site-editor";
    var membershipInfo = data.declaredMemberOf;
    if (membershipInfo) {
        for (var membershipIdx = 0; membershipIdx < membershipInfo.length; membershipIdx++) {
            if (membershipInfo[membershipIdx].authorizableId == groupId) {
                isMember = true;
                break;
            }
        }
    }
    /*This example disables the Hide in Navigation checkbox on Page Properties dialog of the page*/
    if (isMember) {
        $('[name="./hideInNav"]').prop('disabled', 'true');
    }
});

Ajax call should be invoked at the "dialog-ready" event of the document. You need to put the above code in a clientlibs JS file with the category "cq.authoring.dialog".