jQuery验证:一次验证一个字段

时间:2017-01-21 13:13:18

标签: jquery jquery-validate

我知道jQuery Validate默认只显示一个错误。我的目的是创建一个表单,只有在表单填写正确时才启用提交按钮。这是我的两个片段:

jQuery(document).ready(function() {
    jQuery('input').on('blur', function() {
        if (jQuery("#validate-info").valid()) {
            jQuery('#toggle-delivery').removeClass("btn-disabled");  
        } else {
            jQuery('#toggle-delivery').addClass("btn-disabled");
        }
});
  jQuery("#validate-info").validate({         
    rules: {
     phone_number: {
        required: true,
        digits: true,
        minlength: 9
     },
     email_address: {
        required: true,
        email: true
      },
      shipping_first_name: {
        required: true,
        minlength: 2
      },
      shipping_last_name: {
        required: true,
        minlength: 2
      }
    },
    onfocusout: function(e) {
            this.element(e);
    },
    onkeyup: false,
    messages: {
         phone_number: {
          required: "Please enter a valid UK phone number",
          digits: "Please enter a valid UK phone number.",
          minlength: "Please enter at least 9 characters"
         },
         email_address: {
            required: "We need your email address to contact you.",
            email: "Oops! This isn't a correct email format. Please check and try again."
         },
         shipping_first_name: {
          minlength: "Please enter at least 2 characters."
         },
         shipping_last_name: {
          minlength: "Please enter at least 2 characters."
         }
    }
  });
    });

该按钮具有" btn-disabled"默认为class。如果表单有效,则删除该类,并且可以单击该按钮/提交表单。

如果用户离开页面而未提交表单,我也会使用此代码段来保留输入值:

jQuery(document).ready(function() {
    jQuery(window).unload(saveSettings);
    loadSettings();
});

function loadSettings() {
    jQuery('#shipping_first_name.input-text').val(localStorage.shippingfirstname);
    jQuery('#shipping_last_name.input-text').val(localStorage.shippinglastname);
    jQuery('#email_address.input-text').val(localStorage.emailaddress);
    jQuery("#phone_number.input-text").val(localStorage.phonenumber);
    jQuery("#shipping_address_1.input-text").val(localStorage.shippingaddress);
    jQuery('#billing_first_name.input-text').val(localStorage.billingfirstname);
    jQuery('#billing_last_name.input-text').val(localStorage.billinglastname);
    jQuery('#billing_email.input-text').val(localStorage.billingemailaddress);
   jQuery("#billing_phone.input-text").val(localStorage.billingphonenumber);
    jQuery("#billing_address_1.input-text").val(localStorage.billingaddress);
    jQuery('input#ship-to-different-address-checkbox[value="' + localStorage.billtoaddress + '"]').prop('checked', true);
}

function saveSettings() {
    localStorage.shippingfirstname = jQuery('#shipping_first_name.input-text').val();
    localStorage.shippinglastname = jQuery('#shipping_last_name.input-text').val();
    localStorage.emailaddress = jQuery('#email_address.input-text').val();
    localStorage.phonenumber = jQuery("#phone_number.input-text").val();
    localStorage.shippingaddress = jQuery("#shipping_address_1.input-text").val();
    localStorage.billingfirstname = jQuery('#billing_first_name.input-text').val();
    localStorage.billinglastname = jQuery('#billing_last_name.input-text').val();
    localStorage.billingemailaddress = jQuery('#billing_email.input-text').val();
    localStorage.billingphonenumber = jQuery("#billing_phone.input-text").val();
    localStorage.billingaddress = jQuery("#billing_address_1.input-text").val();
    localStorage.billtoaddress = jQuery('input#ship-to-different-address-checkbox[type=checkbox]:checked').val();
}

当用户返回页面时(通过意外刷新或导航到其他页面),这会自动填充表单。

我的问题是,现在,如果用户导航到页面以填写表单(第一次),并完成第一个字段,则在选择下一个字段时,将触发验证并显示所有其他字段红色,每个输入字段下都有错误消息。查看截图:

enter image description here

我该怎样防止这种情况?我想验证每个字段并单独显示错误,而不是一次只显示错误。我怀疑它与代码片段的on('blur'部分有关。我尝试了changekeyup而不是blur,但结果是一样的。当然,我不是专家,所以我不确定这是不是真正的问题。

任何提示?谢谢!

1 个答案:

答案 0 :(得分:1)

我同意它很可能是由您的blur事件处理程序引起的。尝试更改此内容:

if (jQuery("#validate-info").valid()) {

对此:

if (jQuery("#validate-info").validate().checkForm()) {

checkForm()函数应根据表单是否有效返回布尔值,但不会导致出现任何验证错误消息。