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项目中使用到了这个插件,抽了个空,看了一下。

(function($){
var method ={}
$.fn.validationEngine = function(){}
$.validationEngine = {}
$(function(){$.validationEngine.defaults.promptPosition = methods.isRTL()?'topLeft':"topRight"});
})(jQuery)

看一下结构,还是比较清晰的。jQuery的dom对象直接调用就行了,下面我拿jQuery官方上的一个例子来说明

看一下例子:

<!DOCTYPE html>
<html>
<head>
    <meta http-equiv="Content-type" content="text/html; charset=utf-8" />
    <title>JQuery Validation Engine</title>
    <link rel="stylesheet" href="../css/validationEngine.jquery.css" type="text/css"/>
    <link rel="stylesheet" href="../css/template.css" type="text/css"/>
    <script src="../js/jquery-1.8.2.min.js" type="text/javascript">
    </script>
    <script src="../js/languages/jquery.validationEngine-en.js" type="text/javascript" charset="utf-8">
    </script>
    <script src="../js/jquery.validationEngine.js" type="text/javascript" charset="utf-8">
    </script>
    <script>
        jQuery(document).ready(function(){
            // binds form submission and fields to the validation engine
            jQuery("#formID").validationEngine();//初始化
        });
            
    </script>
</head>
<body>
    <p>
        This demonstration shows the prompt position adjustments
        <br/>
    </p>
    <div id="test" class="test" style="width:150px;">This is a div element</div>
    <form id="formID" class="formular" method="post" action="">
        <fieldset>
            <label>
                <span>Fields are required : </span>
                <input value="" class="validate[required] text-input" type="text" name="req" id="req" data-prompt-position="topRight:-70" />
            </label>
            <label>
                <input value="" class="validate[required] text-input" type="text" name="req2" id="req2" data-prompt-position="topRight:-30" />
            </label>
            <label>
                <span>Additional info:</span>
                <textarea class="validate[required]" id="add" style="width:250px;height:50px;"  data-prompt-position="bottomRight:-70,3"></textarea>
            </label>
            <br/>
            <br/>
        </fieldset>
        <input class="submit" type="submit" value="Validate &amp; Send the form!"/><hr/>
    </form>
</body>
</html>

可以看到页面直接调用了validationEngine方法。

 $.fn.validationEngine = function(method) {
         var form = $(this);//获取form对象
         if(!form[0]) return form;  // stop here if the form does not exist 如果不是jQuery的dom对象则返回

         if (typeof(method) == 'string' && method.charAt(0) != '_' && methods[method]) {

             // make sure init is called once
             if(method != "showPrompt" && method != "hide" && method != "hideAll")
             methods.init.apply(form);
return methods[method].apply(form, Array.prototype.slice.call(arguments, 1));//支持传入原型上的方法执行该方法 } else if (typeof method == 'object' || !method) { //该例子中method为undefined // default constructor with or without arguments methods.init.apply(form, arguments);//调用方法对象中的init方法 return methods.attach.apply(form);//调用方法对象中的attach方法 } else { $.error('Method ' + method + ' does not exist in jQuery.validationEngine'); } }

这里,可以看到如果想让验证控件不能工作,在validationEngine方法中传入三种参数,showPrompt,hide,hideAll。等会后面分析,会看到,只要代码处调用传入这个三个参数,插件都将不会工作,因为其中的methods.init,attach方法没有被执行,初始化所导致的结果。其实,如果你传入像'1'这样的参数,插件一样不会工作,不过它会报错,走入最后一个判断,调用$.error抛出异常。

 以下是引擎的工作流程

 在使用jquery.validationEngine.js时还需要一个js文件:包括许多语言包,这里我们就用en包做个示范,引入jQuery.validationEngine-en.js

(function($){
    $.fn.validationEngineLanguage = function(){
    };
    $.validationEngineLanguage = {
        newLang: function(){
            $.validationEngineLanguage.allRules ={}
        }
    };

    $.validationEngineLanguage.newLang();
    
})(jQuery);

validationEngineLanguage方法直接添加到jquery原型上,这里默认没有初始化任何东西,实际开发中,根据需求做适当修改,代码中默认执行一遍$.validationEngineLanguage.newLang(),让$.validationEngineLanguage拥有allRules属性,留心看一下这个allRules的内容

"required": { // Add your regex rules here, you can take telephone as an example
                    "regex": "none",
                    "alertText": "* This field is required",
                    "alertTextCheckboxMultiple": "* Please select an option",
                    "alertTextCheckboxe": "* This checkbox is required",
                    "alertTextDateRange": "* Both date range fields are required"
                }

"phone": {
                    // credit: jquery.h5validate.js / orefalo
                    "regex": /^([\+][0-9]{1,3}[\ \.\-])?([\(]{1}[0-9]{2,6}[\)])?([0-9\ \.\-\/]{3,20})((x|ext|extension)[\ ]?[0-9]{1,4})?$/,
                    "alertText": "* Invalid phone number"
                }
....

类似页面写入一个required,这个字符串会关联许多信息,包括为空的弹出信息,phone这个字符串则关联了匹配的正则和弹出的错误信息。如果需要添加新的匹配功能,这里是可以添加的。

Method.init

init: function(options) {
            var form = this;
            if (!form.data('jqv') || form.data('jqv') == null ) {
                options = methods._saveOptions(form, options);
                // bind all formError elements to close on click
                $(document).on("click", ".formError", function() {//让html标签去监听拥有formError类的元素绑定click事件
                    $(this).fadeOut(150, function() {//实现淡出效果
                        // remove prompt once invisible
                        $(this).parent('.formErrorOuter').remove();//删除其父节点
                        $(this).remove();//删除本身节点
                    });
                });
            }
            return this;
         }

这里.formError是弹出的错误信息的类,这里在init方法中给这些弹出信息添加了click事件,用于关闭它们。

Method._saveOptions

_saveOptions: function(form, options) {
             // is there a language localisation ?
             if ($.validationEngineLanguage)
             var allRules = $.validationEngineLanguage.allRules;
             else
             //这里的else语句就是else下面的紧跟它的第一句代码,不推荐这样写。
             $.error("jQuery.validationEngine rules are not loaded, plz add localization files to the page");
             // --- Internals DO NOT TOUCH or OVERLOAD ---
             // validation rules and i18
             $.validationEngine.defaults.allrules = allRules;
             var userOptions = $.extend(true,{},$.validationEngine.defaults,options);//保存错误规则
             form.data('jqv', userOptions);//将userOptions信息保存在jqv属性中
             return userOptions;
         }

主要是导入jQuery.validationEngine-en.js的内容,将信息保存到jqv属性中,最后返回该信息。

Method.attach

attach: function(userOptions) {//调用者是被验证的form

            var form = this;
            var options;
            if(userOptions)
                options = methods._saveOptions(form, userOptions);
            else
                options = form.data('jqv');//读取form的jqv信息
            //寻找data-validation-engine属性中拥有validate的标签
            options.validateAttribute = (form.find("[data-validation-engine*=validate]").length) ? "data-validation-engine" : "class";
            if (options.binded) {
                //绑定blur事件,如果没有data-validation-engine属性的,那必须拥有包含validate字符串的类,且不是checkbox,radio或者是类datepicker(时间控件)的元素将拥有blur事件
                //为checkbox,radio必须要有validate的控件绑定click事件
                //单独为时间控件绑定blur时间,传入{'delay':300}
                // delegate fields
                form.on(options.validationEventTrigger, "["+options.validateAttribute+"*=validate]:not([type=checkbox]):not([type=radio]):not(.datepicker)", methods._onFieldEvent);
                form.on("click", "["+options.validateAttribute+"*=validate][type=checkbox],["+options.validateAttribute+"*=validate][type=radio]", methods._onFieldEvent);
                form.on(options.validationEventTrigger,"["+options.validateAttribute+"*=validate][class*=datepicker]", {"delay": 300}, methods._onFieldEvent);
            }
            if (options.autoPositionUpdate) {
                $(window).bind("resize", {
                    "noAnimation": true,
                    "formElem": form
                }, methods.updatePromptsPosition);
            }
            //为拥有data-validation-engine-skip属性的a标签和button,input标签,类拥有validate-skip字段的a标签和button,input标签绑定click事件。
            form.on("click","a[data-validation-engine-skip], a[class*='validate-skip'], button[data-validation-engine-skip], button[class*='validate-skip'], input[data-validation-engine-skip], input[class*='validate-skip']", methods._submitButtonClick);
            form.removeData('jqv_submitButton');//删除jqv_submitButton信息

            // bind form.submit
            form.on("submit", methods._onSubmitEvent);//绑定submit
            return this;
        }

绑定了基本上控件的触发事件,这里还要提到的是在我们提交form的时候,会触发插件内容的submit的监听事件,实际上插件会在你提交之前再去帮你检查一遍控件。如果全满足条件了,则将会提交。可以看到很多的控件基本上绑定触发的事件都是method._onFieldEvent方法

这里我们拿_onFieldEvent来看一下。

_onFieldEvent: function(event) {
            var field = $(this);
            var form = field.closest('form, .validationEngineContainer');//找到form对象
            var options = form.data('jqv');//读取jqv属性信息
            options.eventTrigger = "field";
            // validate the current field
            window.setTimeout(function() {
                methods._validateField(field, options);
                if (options.InvalidFields.length == 0 && options.onFieldSuccess) {
                    options.onFieldSuccess();
                } else if (options.InvalidFields.length > 0 && options.onFieldFailure) {
                    options.onFieldFailure();
                }
            }, (event.data) ? event.data.delay : 0);

        }

将执行函数放入setTimeout中,这里考虑到一个datepicker插件的问题。

这里_validateField的全部代码就不贴了,分析一下里面几块重要的部分

var rulesParsing = field.attr(options.validateAttribute);//获取控件的类或者data-validation-engine属性
            var getRules = /validate\[(.*)\]/.exec(rulesParsing);//var getRules = rulesParsing.match(/validate\[(.*)\]/);数组中第一个是匹配整条正则,第二个成员是匹配子表达式
            if (!getRules)
                return false;//如果数组为空,表示不匹配,则返回
            var str = getRules[1];//获取子表达式匹配的内容
            var rules = str.split(/\[|,|\]/);//将以类似[,],','分开字符串,考虑validate[]中嵌套多个内容


for (var i = 0; i < rules.length; i++) {
                rules[i] = rules[i].replace(" ", "");//去掉空白
                // Remove any parsing errors
                if (rules[i] === '') {
                    delete rules[i];//删除空的规则
                }
            }

这里是对rules的解析,将原来的例子修改一下

<input value="" class="validate[required,custom[email]] text-input" type="text" name="req" id="req" data-prompt-position="topRight:-70" />

这里为什么不直接写validate[required,email],或者是validate[required,xx[email]](xx不是custom)了?带着这些疑问,我们来看一下源码。

源码中getRules使用的是exec来获取匹配的结果文本,这里的匹配结果是[validate[reuqired,custom[email]] text-input,required,custom[email]]。再看str,它的值为required,custom[email],再经过split分隔,rule将变为[required,custom,email,''],最后经过for循环遍历将将空字符串的成员delete掉,最后结果是[required,custom,email,undefined]。至于为什么要加这个custom,不急,我们慢慢看。

其实这个插件将控件需要执行的验证规则都写在了class类中,也就是说我们在validate[]中写了一些规则,那么控件将会执行这些规则,其实required则表示为必填,email则表示为输入email格式。两者必须同时满足。

源码下面会再经历一次for循环,但是注意,这里多了一个switch判断,将rules中有的规则一一过滤出来,执行相应的方法。如果你留心看一下这个switch,你就会发现,这里面根本没有email的选择类型,所以说你直接在页面上写成validate[required,email]是不会有效果的。我们可以看到有custom的判断。进入看一下这个custom,到底是什么

case "custom":
                        errorMsg = methods._getErrorMessage(form, field, rules[i], rules, i, options, methods._custom);
                        break;

_getErrorMessage这个方法说白了,就是获取错误信息,执行传入的回相对应的调函数

_getErrorMessage:function (form, field, rule, rules, i, options, originalValidationMethod) {
             // If we are using the custon validation type, build the index for the rule.
             // Otherwise if we are doing a function call, make the call and return the object
             // that is passed back.
              var rule_index = jQuery.inArray(rule, rules);//确定rule在rules中的位置
             if (rule === "custom" || rule === "funcCall") {
                 var custom_validation_type = rules[rule_index + 1];
                 rule = rule + "[" + custom_validation_type + "]";
                 // Delete the rule from the rules array so that it doesn't try to call the
                // same rule over again
                delete(rules[rule_index]);
             }
             // Change the rule to the composite rule, if it was different from the original
             var alteredRule = rule;


             var element_classes = (field.attr("data-validation-engine")) ? field.attr("data-validation-engine") : field.attr("class");
             var element_classes_array = element_classes.split(" ");

             // Call the original validation method. If we are dealing with dates or checkboxes, also pass the form
             var errorMsg;
             if (rule == "future" || rule == "past"  || rule == "maxCheckbox" || rule == "minCheckbox") {
                 errorMsg = originalValidationMethod(form, field, rules, i, options);
             } else {
                 errorMsg = originalValidationMethod(field, rules, i, options);//执行回调函数,获得错误信息
             }

             // If the original validation method returned an error and we have a custom error message,
             // return the custom message instead. Otherwise return the original error message.
             if (errorMsg != undefined) {
                 var custom_message = methods._getCustomErrorMessage($(field), element_classes_array, alteredRule, options);
                 if (custom_message) errorMsg = custom_message;
             }
             return errorMsg;

         }

下面就是method._custom方法

_custom: function(field, rules, i, options) {
            var customRule = rules[i + 1];
            var rule = options.allrules[customRule];
            var fn;
            if(!rule) { //规则没有,则提示返回
                alert("jqv:custom rule not found - "+customRule);
                return;
            }
            
            if(rule["regex"]) {
                 var ex=rule.regex;//获取相应正则
                    if(!ex) {
                        alert("jqv:custom regex not found - "+customRule);
                        return;
                    }
                    var pattern = new RegExp(ex);//转成正则表达式

                    if (!pattern.test(field.val())) return options.allrules[customRule].alertText;//匹配正则
                    
            } else if(rule["func"]) { //自定义方法验证,根据返回结果判断
                fn = rule["func"]; 
                 
                if (typeof(fn) !== "function") {
                    alert("jqv:custom parameter 'function' is no function - "+customRule);
                        return;
                }
                 
                if (!fn(field, rules, i, options))
                    return options.allrules[customRule].alertText;
            } else {
                alert("jqv:custom type not allowed "+customRule);
                    return;
            }
        }

其实看到这里,我们大致明白了,核心还是调用了rule['regex']的正则表达式。其实换了思维想一下,如果我们把email直接写在switch中,那其实会有几十种,甚至是几百种情况,那一起写在switch中明显是不明智的,这个custom相当于做了个简单的带头作用,将这些更细节的验证判断,统统挂上custom的名,再进行验证。那么这个_required其实很类似

_required: function(field, rules, i, options, condRequired) {
            switch (field.prop("type")) {//取触发控件的类型,注意这里attr,css都不能完全取到,这里作者使用它的是prop
                case "text":
                case "password":
                case "textarea":
                case "file":
                case "select-one":
                case "select-multiple":
                default:
                    var field_val      = $.trim( field.val()                               );//去除输入的空格符
                    var dv_placeholder = $.trim( field.attr("data-validation-placeholder") );
                    var placeholder    = $.trim( field.attr("placeholder")                 );
                    if (
                           ( !field_val                                    )
                        || ( dv_placeholder && field_val == dv_placeholder )
                        || ( placeholder    && field_val == placeholder    )
                    ) {
                        return options.allrules[rules[i]].alertText;//返回不填的错误信息
                    }
                    break;
                case "radio":
                case "checkbox":
                    // new validation style to only check dependent field
                    if (condRequired) {
                        if (!field.attr('checked')) {
                            return options.allrules[rules[i]].alertTextCheckboxMultiple;
                        }
                        break;
                    }
                    // old validation style
                    var form = field.closest("form, .validationEngineContainer");
                    var name = field.attr("name");
                    if (form.find("input[name='" + name + "']:checked").size() == 0) {
                        if (form.find("input[name='" + name + "']:visible").size() == 1)
                            return options.allrules[rules[i]].alertTextCheckboxe;
                        else
                            return options.allrules[rules[i]].alertTextCheckboxMultiple;
                    }
                    break;
            }
        }

这些方法进过验证之后,如果不满足情况,将会获得错误信息

在流程图的最后,整个插件的_showPrompt和_buildPrompt方法主要是生成页面提示

_showPrompt: function(field, promptText, type, ajaxed, options, ajaxform) {
             var prompt = methods._getPrompt(field);
             // The ajax submit errors are not see has an error in the form,
             // When the form errors are returned, the engine see 2 bubbles, but those are ebing closed by the engine at the same time
             // Because no error was found befor submitting
             if(ajaxform) prompt = false;
             // Check that there is indded text
             if($.trim(promptText)){ 
                 if (prompt)
                    methods._updatePrompt(field, prompt, promptText, type, ajaxed, options);
                 else
                    methods._buildPrompt(field, promptText, type, ajaxed, options);
            }
         }

看一下_buildPrompt方法

_buildPrompt: function(field, promptText, type, ajaxed, options) {

            // create the prompt
            var prompt = $('<div>');
            prompt.addClass(methods._getClassName(field.attr("id")) + "formError");
            // add a class name to identify the parent form of the prompt
            prompt.addClass("parentForm"+methods._getClassName(field.closest('form, .validationEngineContainer').attr("id")));
            prompt.addClass("formError");//制作错误提示框,放上相应的class,这些class之前被监听过事件
            switch (type) {
                case "pass":
                    prompt.addClass("greenPopup");
                    break;
                case "load":
                    prompt.addClass("blackPopup");
                    break;
                default:
                    /* it has error  */
                    //alert("unknown popup type:"+type);
            }
            if (ajaxed)
                prompt.addClass("ajaxed");
            // create the prompt content
            var promptContent = $('<div>').addClass("formErrorContent").html(promptText).appendTo(prompt);//将错误信息放在div中插入prompt中

            // determine position type
            var positionType=field.data("promptPosition") || options.promptPosition;
            // create the css arrow pointing at the field
            // note that there is no triangle on max-checkbox and radio
            if (options.showArrow) {
                var arrow = $('<div>').addClass("formErrorArrow");
                //prompt positioning adjustment support. Usage: positionType:Xshift,Yshift (for ex.: bottomLeft:+20 or bottomLeft:-20,+10)
                if (typeof(positionType)=='string') 
                {
                    var pos=positionType.indexOf(":");
                    if(pos!=-1)
                        positionType=positionType.substring(0,pos);
                }

                switch (positionType) {//生成小三角
                    case "bottomLeft":
                    case "bottomRight":
                        prompt.find(".formErrorContent").before(arrow);
                        arrow.addClass("formErrorArrowBottom").html('<div class="line1"><!-- --></div><div class="line2"><!-- --></div><div class="line3"><!-- --></div><div class="line4"><!-- --></div><div class="line5"><!-- --></div><div class="line6"><!-- --></div><div class="line7"><!-- --></div><div class="line8"><!-- --></div><div class="line9"><!-- --></div><div class="line10"><!-- --></div>');
                        break;
                    case "topLeft":
                    case "topRight":
                        arrow.html('<div class="line10"><!-- --></div><div class="line9"><!-- --></div><div class="line8"><!-- --></div><div class="line7"><!-- --></div><div class="line6"><!-- --></div><div class="line5"><!-- --></div><div class="line4"><!-- --></div><div class="line3"><!-- --></div><div class="line2"><!-- --></div><div class="line1"><!-- --></div>');
                        prompt.append(arrow);
                        break;
                }
            }
            // Add custom prompt class
            if (options.addPromptClass)
                prompt.addClass(options.addPromptClass);

            // Add custom prompt class defined in element
            var requiredOverride = field.attr('data-required-class');
            if(requiredOverride !== undefined) {
                prompt.addClass(requiredOverride);
            } else {
                if(options.prettySelect) {
                    if($('#' + field.attr('id')).next().is('select')) {
                        var prettyOverrideClass = $('#' + field.attr('id').substr(options.usePrefix.length).substring(options.useSuffix.length)).attr('data-required-class');
                        if(prettyOverrideClass !== undefined) {
                            prompt.addClass(prettyOverrideClass);
                        }
                    }
                }
            }
            prompt.css({
                "opacity": 0
            });
            if(positionType === 'inline') {
                prompt.addClass("inline");
                if(typeof field.attr('data-prompt-target') !== 'undefined' && $('#'+field.attr('data-prompt-target')).length > 0) {
                    prompt.appendTo($('#'+field.attr('data-prompt-target')));
                } else {
                    field.after(prompt);
                }
            } else {
                field.before(prompt);//在触发控件的前面插入
            }
            
            var pos = methods._calculatePosition(field, prompt, options);
            prompt.css({
                'position': positionType === 'inline' ? 'relative' : 'absolute',
                "top": pos.callerTopPosition,
                "left": pos.callerleftPosition,
                "marginTop": pos.marginTopSize,
                "opacity": 0
            }).data("callerField", field);


            if (options.autoHidePrompt) {
                setTimeout(function(){
                    prompt.animate({
                        "opacity": 0
                    },function(){
                        prompt.closest('.formErrorOuter').remove();
                        prompt.remove();
                    });
                }, options.autoHideDelay);
            } 
            return prompt.animate({
                "opacity": 0.87 //动画效果
            });
        }

生成的小三角的实现方式比较特别。。将错误内容放入div中,将生成div插在被触发控件的前面,并且为div加上class,为什么加,在init方法中,我们已经为这类class添加了click事件,功能是点击能够删除它们。

以上完成一遍简单的验证过程。

另外,这个插件还有一个强大的功能,就是提供的ajax验证。

<input type="text" name="id" id="id" class="validate[required,ajax[ajaxUserCallPhp]]"/>

以上是页面需要添加的东西,因为关联到ajaxUserCallPhp,我们修改一下jQuery.validationEngine-en.js,找到ajaxUserCallPhp

"ajaxUserCallPhp": {
                    "url": "../jsp/login_check.jsp",//修改成你要跳转的路径,或者你自己新写一个关联对象
                    // you may want to pass extra data on the ajax call
                    "extraData": "name=eric",
                    // if you provide an "alertTextOk", it will show as a green prompt when the field validates
                    "alertTextOk": "* This username is available",
                    "alertText": "* This user is already taken",
                    "alertTextLoad": "* Validating, please wait"
                }

这里源码是php,我这里暂时就修改为jsp页面。

String yc = (String)request.getParameter("fieldValue");
String elementId = (String)request.getParameter("fieldId");

注意后台如何获取ajax请求里的值,这里你使用抓包之类的工具就可以清楚看到url上类似拼接有fieldValue=xx&fieldId=xx,所以后台采用如此接住传过来的参数,查询数据库,判断是否有用户名,最后往ajax返回信息时

String json = "{\"0\":\""+elementId+"\",\"1\":\""+da+"\",\"2\":\"yc\"}";
out.println(json);

这里我简单的使用拼接的方式传递了json格式的数据,到时候,大家根据实际情况做修改。

 尝试去找method里的_ajax方法,可以发现这个_ajax方法其实调用了$.ajax的方法提交请求,注意在提交之前,经过了两次for循环,主要是分解extraData,将信息组装成json格式传入data中,最后将data放入请求中根据url发送到后台。关于$.ajax,会有一个success的回调

success: function(json) {
                         // asynchronously called on success, data is the json answer from the server
                         var errorFieldId = json[0];
                         //var errorField = $($("#" + errorFieldId)[0]);
                         var errorField = $("#"+ errorFieldId).eq(0);
                         // make sure we found the element
                         if (errorField.length == 1) {
                             var status = json[1];
                             // read the optional msg from the server
                             var msg = json[2];
                             if (!status) {
                                 // Houston we got a problem - display an red prompt
                                 options.ajaxValidCache[errorFieldId] = false;
                                 options.isError = true;

                                 // resolve the msg prompt
                                 if(msg) {
                                     if (options.allrules[msg]) {
                                         var txt = options.allrules[msg].alertText;
                                         if (txt) {
                                            msg = txt;
                                         }
                                     }
                                 }else
                                    msg = rule.alertText;
                                 if (options.showPrompts) methods._showPrompt(errorField, msg, "", true, options);
                             } else {
                                 options.ajaxValidCache[errorFieldId] = true;

                                 // resolves the msg prompt
                                 if(msg) { //验证之后需要调用的参数方法,这个参数存在与allrules中if (options.allrules[msg]) {
                                         var txt = options.allrules[msg].alertTextOk;
                                         if (txt) {
                                            msg = txt;
                                         }
                                     }
                                 }
                                 else
                                 msg = rule.alertTextOk;
                                 if (options.showPrompts) {
                                     // see if we should display a green prompt
                                     if (msg)
                                        methods._showPrompt(errorField, msg, "pass", true, options);
                                     else
                                        methods._closePrompt(errorField);
                                }
                                
                                 // If a submit form triggered this, we want to re-submit the form
                                 if (options.eventTrigger == "submit")
                                    field.closest("form").submit();
                             }
                         }

这里回调函数中采用json[0],json[1],json[2]等方式取后台信息,个人觉得并不是很好,这样导致很多时候,后台发来的数据需要根据这个API接口来封装数据,有的时候会有点麻烦。感觉自定义回调比较好一点。这里我说明下这个回调里的几个参数的含义errorFieldId:表示触发ajax验证的控件的id,这个id在放送请求的时候传输到后台,并再次由后台传回前台,这个值需要有。status:举个例子,如果你输入一个用户名,如果这个用户名还没有注册,像前台传输一个status值,要非空,这样告诉前台数据库中没有这个新建的用户名。表示用户名可以注册。那第三个msg:如果你需要在ajax成功返回之后想触发其他method里的方法,可以写allrules里有的方法名即可,你也可以自己输入字符串信息,那最后提示框中将使用你自定义的信息。

以上完成了插件的ajax验证。上面的分析可能不是很全面,如果这个插件有新的功能我还没有用到,希望大家提出来,一起分享分享。

内容不多,时间刚好,以上是我的一点读码体会,如有错误,请指出,大家共通学习。