jQuery验证插件:强制对空字段进行验证 [英] jQuery Validation PlugIn : Forcing Validation on empty Field

问题描述

我有一个带有字段的表格.第一个是必需的.

I have a form with tho fields. The first one is required.

步骤1.提交表单时，出现预期的错误. 步骤2.然后，如果我在字段上输入文本，则错误文本将很清楚，这是完美的.

step 1. When I submit the form, I get the error as expected. step 2. Then if I enter a text on the field, the error text is clear, which is perfect.

我唯一担心的是，如果我删除输入的文本，将该字段留空，则验证不会启动！

My only concern is that if I remove the text entered, leaving the field empty, the validation don't fire up!

有没有一种方法可以强制对空字段进行验证?还是至少使用在第2步中使用的回调函数?验证失败后，我想执行一些任务.

Is there a way to force validation on empty fields? or at least use the callback function that is used on step 2? I want to perform some tasks when a validation fails.

目标是每次验证失败时更改标签的类别.

The goal is to change the class of a label every time the validation fails.

推荐答案

我用过

onkeyup : function(element){
        if ($(element).valid()==0) {
            $(element).prev().removeClass();
            $(element).prev().addClass("status_form_warning");    
        }

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