带有验证的 JavaScript 表单ajax 提交做一些时髦的事情

问题描述

我正在尝试使用 ajax 提交执行表单验证功能。由于某种原因验证不起作用，当它提交时，我的服务器获取空字段（当我测试验证时）但它表明它试图发布到同一页面......我不知道为什么.

表格：

<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-BmbxuPwQa2lc/FVzBcNJ7UAyJxM6wuqIj61tLrc4wSX0szH/Ev+nYRRuWlolflfl" crossorigin="anonymous">
<form id='form' novalidate method="post" class='m-2 p-1'>
  <div class='row'>
    <div class='col p-1'>
      <div class="form-floating mb-3">
        <input required type="text" name='First Name' class="form-control" id="fname" placeholder="First Name">
        <label for="fname">First Name<span class='red' aria-label='required'> *</span></label>
      </div>
    </div>
    <div class='col p-1'>
      <div class="form-floating mb-3">
        <input required type="text" name='Last Name' class="form-control" id="lname" placeholder="Last Name">
        <label for="lname">Last Name</label>
      </div>
    </div>
  </div>
  <div class='row'>
    <div class='col p-1'>
      <div class="form-floating mb-3">
        <input required type="email" name='Email' class="form-control" id="email" placeholder="Email">
        <label for="lname">Email <span class='red' aria-label='required'> *</span></label>
      </div>
    </div>
    <div class='col p-1'>
      <div class="form-floating mb-3">
        <select required name='Reason For Contacting' class="form-control" id="reason" placeholder="Reason For Contacting">
          <option value='Feedback' selected>Feedback</option>
          <option value='other'>Other</option>
        </select>
        <label for="why">Reason For Contacting<span class='red' aria-label='required'> *</span></label>
      </div>
    </div>
  </div>
  <div class='row'>
    <div class='col p-1'>
      <div class="form-floating mb-3">
        <textarea required name='Comments' class="form-control" id="comment" placeholder="Your Comments"></textarea>
        <label for="comment">Your Comments<span class='red' aria-label='required'> *</span></label>
      </div>
    </div>
  </div>
  <div class='row'>
    <div class='col p-1'>
      <button class='form-control btn btn-outline-primary' id='submit'>Send</button>
    </div>
  </div>
</form>

我的 JS 文件：

$(document).ready(() => {
  autosize($('textarea'))
  $('#submit').click((e) => {
    if (validate() == true) {
      sendForm();
    } else {
      error(validate())
    }
  })
})
var errors;
window.onerror = function(msg,url,linenumber) {
  alert('Error message: ' + msg + '\nURL: ' + url + '\nLine Number: ' + linenumber);
  return true;
}

function validate() {
  elements = $(':input')
  elements.each((element) => {
    element = $(element).get()
    if (element.value === '' || !email(element)) {
      errors += element.name + " is invalid."
    } else {
      return;
    }
  })
  if (errors) {
    return errors
  } else true;
}

function sendForm() {
  name = $('input[name="First Name"]').val().trim() + " " + $('input[name="Last Name"]').val().trim()
  email = $('input[name="Email"]').val().trim()
  why = $("select").val().trim()
  comments = $('textarea').val().trim()
  data = {
    "name": name,"email": email,"reason": why,"text": comments
  }
  $.ajax({
    type: 'POST',url: 'https://admin.bekesbikes.tk/contact',crossDomain: true,data: data,dataType: 'json',success: (responseData,textStatus,errorThrown) => {
      new Notify({
        title: 'Submitted!',text: 'Your Feedback has been recorded!\n\nWe will get back to your email shortly!\n\nHope to see you soon!',effect: 'slide',status: 'success',speed: 1000,autoclose: true
      })
      $(':input').val('');
      $('select').val('Feedback')
    },error: (responseData,errorThrown) => {
      new Notify({
        title: 'Could not submit!',text: 'The form Could not be submitted.\n\nPlease try again or come back later!\n\nSorry for the inconvenience.',customIcon: "<img src='https://www.flaticon.com/svg/vstatic/svg/753/753345.svg?token=exp=1616679486~hmac=4f66bb69b263e9e4d9be5038a16cc41d' width='50px'>",status: 'error',autoclose: true
      })
    }
  });
}

function error(text) {
  new Notify({
    title: 'Form Fields Are Not Correct',text: text,status: 'info',autoclose: true
  })
}

function send() {
  if (validate()) {
    sendForm()
  } else {
    error(validate())
  }
}

function email(element) {
  if (element.type === 'email' && /^[^\s@]+@[^\s@]+$/.text(element.value)) {
    return true;
  } else if (element.type !== 'email') {
    return true;
  } else {
    return false;
  }
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

提交时我会去哪里（表单位于此 URL）：

知道我应该做什么吗？

请注意，我将 node.js 与 express.js 一起使用。

编辑

我在提交事件处理程序中添加了：e.preventDefault()，但是现在当我提交表单而不填写任何内容时，我收到以下通知：

解决方法

我更改了您的点击处理程序：

• 默认预防，
• validate() 作为变量，使其只运行一次，

错误声明

• 空字符串而不是未定义，

你的validate()函数

• 使用 :not() 排除按钮，
• 将箭头函数改为普通匿名函数，
• 使用 this 而不是元素，它只是一个索引，
• 添加了到最后一个 else 的返回，

和你的 email() 函数

• 将电子邮件验证外包给自己的函数。

我也删除了send()，因为它没有被使用，用var声明sendForm()中的变量并添加了许多分号->可能在你的代码中已经缺少一个，你希望js纠错会添加他们自动...

最后，我将参数 showIcon 添加到您的 Notify 对象（即“未定义”部分；）

$(document).ready(() => {

  autosize($('textarea'))
    
    $('#form').submit((e) => {
        e.preventDefault();
        var validated = validate();
        if (validated == true) {
            sendForm();
        } else error(validated);
    });
    
    var errors = '';

    window.onerror = function(msg,url,linenumber) {
        alert('Error message: ' + msg + '\nURL: ' + url + '\nLine Number: ' + linenumber);
        return true;
    }

    function validate() {
        elements = $(':input:not(button)');
        elements.each(function() {
            if (this.value === '' || !email(this)) {
                errors += this.name + " is invalid.";
            } else return;
        });
        if (errors) {
            return errors;
        } else return true;
    }

    function sendForm() {
        var name = $('input[name="First Name"]').val().trim() + " " + $('input[name="Last Name"]').val().trim();
        var email = $('input[name="Email"]').val().trim();
        var why = $("select").val().trim();
        var comments = $('textarea').val().trim();
        var data = {
            "name": name,"email": email,"reason": why,"text": comments
        };
        $.ajax({
            type: 'POST',url: 'https://admin.bekesbikes.tk/contact',crossDomain: true,data: data,dataType: 'json',success: (responseData,textStatus,jqXHR) => {
                new Notify({
                    title: 'Submitted!',text: 'Your feedback has been recorded!\n\nWe will get back to your email shortly!\n\nHope to see you soon!',effect: 'slide',status: 'success',speed: 1000,autoclose: true,showIcon: false
                });
                $(':input').val('');
                $('select').val('Feedback');
            },error: (jqXHR,errorThrown) => {
                new Notify({
                    title: 'Could not submit!',text: 'The form could not be submitted.\n\nPlease try again or come back later!\n\nSorry for the inconvenience.',customIcon: "<img src='https://www.flaticon.com/svg/vstatic/svg/753/753345.svg?token=exp=1616679486~hmac=4f66bb69b263e9e4d9be5038a16cc41d' width='50px'>",status: 'error',showIcon: true
                });
            }
        });
    }

    function error(text) {
        new Notify({
            title: 'Form Fields Are Not Correct',text: text,status: 'info',showIcon: false
        })
    }

    function validateEmail(email) {
        const re = /^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
        return re.test(email);
    }

    function email(element) {
        if (element.type === 'email' && validateEmail(element.value)) {
            return true;
        } else if (element.type !== 'email') {
            return true;
        } else return false;
    }
    
});