var validataForm = (function(model) {
 model.Key = "[data-required='true']";
 model.ElementList = new Array();
 model.FunctionDictionary = new Dictionary();
 model.ToastrCustom = function (msg) {
 alert(msg);
 }

 model.AddElement = function (name) {
 model.ElementList.push(name);
 };

 model.AddFunction = function (name, func) {
 model.FunctionDictionary.add(name, func);
 };

 model.Validata = function (formName) {
 for (var i = 0; i < model.ElementList.length; i++) {
 var thisObj = model.ElementList[i];
 var str = formName + " " + thisObj + model.Key;
 var elements = $(str);

 for (var j = 0; j < elements.length; j++) {
 var element = elements.eq(j);
 var value = element.val();

 var elementType = element.data().type;

 var func = model.FunctionDictionary.find(elementType);
 if (func) {
 var result = func(value, element);

 if (result.status) {
 var errorInfo = result.message;
 model.ToastrCustom(errorInfo);
 return;
 }
 }
 }
 }
 };

 model.ElementList.push("input");
 model.ElementList.push("select");
 model.FunctionDictionary.add("required", function (value, element) {
 var name = element.data().name;

 return {
 status: (value === ""),
 message: (value === "" && name + "不能為空")
 };
 });

 return model;
})(window.validataForm || {});

<form id="ValidataForm">
 <input data-required="true" data-name="名稱" data-type="required" value="">
 <input data-required="true" data-name="昵稱" data-type="hello">
 <button id="Send">提交</button>
</form>
<script src="~/js/plugs/jquery-3.3.1.js"></script>
<script src="~/js/Dictionary.js"></script>
<script src="~/js/ValidataForm.js"></script>
<script type="text/javascript">
 $("#Send").click(function () {
 validataForm.Validata("#ValidataForm");
 });
</script>

/* https://www.cnblogs.com/baiyangyuanzi/p/6689554.html */
/*字典 Dictionary類*/
function Dictionary() {
 this.add = add;
 this.datastore = new Array();
 this.find = find;
 this.remove = remove;
 this.count = count;
 this.clear = clear;
}

function add(key, value) {
 this.datastore[key] = value;
}

function find(key) {
 return this.datastore[key];
}

function remove(key) {
 delete this.datastore[key];
}

function count() {
 /*var ss = Object.keys(this.datastore).length;
 console.log("ssss "+ss);
 return Object.keys(this.datastore).length;*/
 /**/
 var n = 0;
 for (var key in Object.keys(this.datastore)) {
 ++n;
 }
 return n;
}

function clear() {
 for (var key in this.datastore) {
 delete this.datastore[key];
 }
}