ajax form - clear form on success, block btn#submit, timeout redirect to other page

ajax.html

////ajax form, clear form on success,block btn#submit,timeout redirect
$(".app-form").submit(function(event){//form class
  event.preventDefault();//stop default
	submitForm();//send to function
});
function submitForm(){
    var name = $("#name").val();//input id="name"
    var tel = $("#tel").val();//input id="tel"
 
    $.ajax({
        type: "POST",
        url: "sender.php",
        data: "name=" + name + "&tel=" + tel,
        success : function(data){
		    $("#appform")[0].reset();//reset form
		    $("#submit").attr('disabled', 'disabled');//block btn
		    setTimeout(function(){location.href="thank-you-page.html"} , 300);//redirect to thank-you-page
        }
    });
}