在jquery.validate.unobtrusive中重写ErrorPlacement函数的正确方法是什么？
查看jquery.validate.unobtrusive.js脚本，开发人员的意图似乎是允许您通过设置$jQval.unobtrusive.options来应用自己的ErrorPlacement函数。
在定义errorPlacement函数的validationInfo(form)函数中，我们看到对execInContext("errorPlacement", arguments)的调用。
看起来如果我们在$.validator.unobtrusive.options下创建一个errorPlacement函数，那么this将被调用。

$.validator.unobtrusive.options = {
    errorPlacement: function () {
        console.log("hello");
    }
};

问题是必须在jquery.validate.js之后和引用jquery.validate.unobtrusive.js之前配置。否则，$jQval.unobtrusive.options是null，$form.data(data_validation, result)将不会再次设置。

function validationInfo(form) {
    var $form = $(form),
        result = $form.data(data_validation),
        onResetProxy = $.proxy(onReset, form),
        defaultOptions = $jQval.unobtrusive.options || {},
        execInContext = function (name, args) {
            var func = defaultOptions[name];
            func && $.isFunction(func) && func.apply(form, args);
        }

    if (!result) {
        result = {
            options: {  // options structure passed to jQuery Validate's validate() method
                errorClass: defaultOptions.errorClass || "input-validation-error",
                errorElement: defaultOptions.errorElement || "span",
                errorPlacement: function () {
                    onError.apply(form, arguments);
                    execInContext("errorPlacement", arguments);
                },
                invalidHandler: function () {
                    onErrors.apply(form, arguments);
                    execInContext("invalidHandler", arguments);
                },
                messages: {},
                rules: {},
                success: function () {
                    onSuccess.apply(form, arguments);
                    execInContext("success", arguments);
                }
            },
            attachValidation: function () {
                $form
                    .off("reset." + data_validation, onResetProxy)
                    .on("reset." + data_validation, onResetProxy)
                    .validate(this.options);
            },
            validate: function () {  // a validation function that is called by unobtrusive Ajax
                $form.validate();
                return $form.valid();
            }
        };
        $form.data(data_validation, result);
    }

    return result;
}

另一种处理方法是：
1.设置$.validator.unobtrusive.optionserrorPlacement功能
1.删除不显眼的验证
1.重新应用不显眼的验证

$.validator.unobtrusive.options = {
    errorPlacement: function () {
        console.log("errorPlacement");
    }
};

$("#form_selector").removeData("unobtrusiveValidation");

// reapply the form's validator
$.validator.unobtrusive.parse(document);

或者另一种选择是覆盖函数调用。

var validator = $("#form_selector").data('validator');
var originalFunction = validator.settings.errorPlacement;
validator.settings.errorPlacement = function(error,element) {
    console.log("errorPlacement");
    originalFunction(error, element);
};

哪种方法是实现自己的errorPlacement方法的正确方法？