使用jQuery表单无效时如何验证和限制提交

时间：2019-11-15 13:00:18

标签： javascript jquery html css

我正在使用一个动态表和表单，我在窗体和该动态表验证中创建了一个小型验证表单。它可以工作，但是如果表单无效，则其提交也可以..不需要。 只想在表单有效时才提交表单。否则，将显示限制错误消息。如“此字段为必填项”

在这里摆弄。

FIDDLE HERE..

我的示例代码在这里。

$(document).ready(function() {

  $('#contactForm').validate({
    rules: {
      acctcode: {
        required: true
      },
      accountName: {
        required: true
      },
      narr: {
        required: true
      },
      debit: {
        required: true
      },
      billtype: {
        required: true
      },
      cashactcode: {
        required: true
      }
    },
    submitHandler: function(form) {
      alert('valid form');
      return false;
    }
  });
  $('#cashSub').on('click', function() {
    $('#contactForm').valid();
  });

});


$(document).ready(function() {

  $("#add_Row").on("click", function() {
    var counter = 0;
    var idVal = $('#tab_logic tr:last').find('td:first').html();
    var matches = idVal.match(/\d+/g);
    if (matches != null) {
      counter = Number(matches) + counter + 1;
    }
    var newRow = $("<tr>");
    var cols = "";
    cols += '<td><select class="form-control sel_sel status" id="accountName' + counter + '" name="accountName" required><option>Select cash account</option><option value="1">TDS A/c 1</option><option value="2">TDS A/c 2</option><option value="3">TDS A/c 3</option></select></td>'
    cols += '<td><input type="text" class="form-control required price" name="narr" placeholder="Enter your text here" id="acc_narrat' + counter + '" data-toggle="modal" data-target="#narratModal" onchange="unname(this.id, this.value)"/></td>';

    cols += '<td><button type="button" class="adRow ibtnDel" style="width:70%;">x</button></a></td>';

    newRow.append(cols);


    var defVal = $("select[name=acctname]").find(":selected").val();
    if (defVal) {
      $("select[name=accountName]").find(`option[value=${defVal}]`).hide();
    }
    $("table.order-list").append(newRow);
    setValCashVal('accountName'.concat(counter));
    bindScript();
    counter++;

  });
  $("table.order-list").on("click", ".ibtnDel", function(_event) {
    $(this).closest("tr").remove();
    evaluateTotal();
  });
});

/* Apend value to all row */
$("#ok_button").on('click', function() {
  let val = $("#cash_text").val();
  $("#pay_narrat, #acc_narrat").val(val);
});
.load {
  border-color: black;
  background-color: plum !important;
}

.load:hover {
  background-color: blue
}
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>

<form id="contactForm">

  <input type="button" class="add_Row adRow" id="add_Row" value="Add Row">
  <table class="table table-bordered table-hover order-list" id="tab_logic" style="width:60% !important">

    <tbody>
      <tr id="fst_row">
        <td>
          <select class="form-control sel_sel" id="payacc" name="actname" for="actname">
            <option value="">Select TDS A/c name</option>
            <option value="1">TDS A/c 1</option>
            <option value="2">TDS A/c 2</option>
            <option value="3">TDS A/c 3</option>
          </select>
        </td>
        <td>
          <input type="text" class="form-control required" id="pay_narrat" name="narr" for="narr" data-toggle="modal" data-target="#narratModal" placeholder="Enter your text here" />

        </td>
      </tr>
    </tbody>
  </table>

  <!-- narrtion modal -->

  <div class="modal fade" id="narratModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
    <div class="modal-dialog">
      <div class="modal-content">
        <div class="modal-header">
          <button type="button" class="close cash-dismiss" data-dismiss="modal" aria-label="Close">
          <span aria-hidden="true">&times;</span>
        </button>
          <h4 class="modal-title modal_head" id="myModalLabel">Narration</h4>
        </div>
        <div class="modal-body">
          <label class="modal_note">Note: Only alphabets A-Z a-z number 0-9 and characters % [] () - _ . , are allowed in text</label>
          <textarea id="cash_text" class="cash_text" maxlength="200">Enter Here...</textarea>
          <span class="modal_valid">0/200 Characterts entered</span>
        </div>
        <div class="modal-footer narr_footer">
          <button id="ok_button" type="button" class="btn btn-primary cashmodal_btn" data-dismiss="modal">OK</button>
        </div>
      </div>
    </div>
  </div>

</form>
<!-- submit -->
<div class="form-group col-4 vocSub" style="margin-bottom: 0px !important;">
  <div class="col-md-12 cashform_submit" id="">
    <input type="submit" class="btn add-btn submit-btn load cashmainBtn" id="cashSub" th:value="Submit" tabindex="1" value="Submit" />
  </div>
</div>

2 个答案:

答案 0 :(得分：1)

有两种方式提交表单。在表单中包含“提交”按钮，或者从jQuery代码动态提交for。

对于您而言，第一个问题是，每当您使用Add Row按钮动态添加新字段时，它都不会将验证规则应用于动态添加的字段。您需要像我在小提琴中应用的那样动态应用规则。

仅供参考

$('input.narr').each(function() {
        $(this).rules("add", 
        {
            required: true
        })
});

我暂时禁用了通过单击文本字段打开的模式。请参阅小提琴，如有任何问题，请通知我。

$(document).ready(function() {

  $('#contactForm').validate({
    rules: {
      acctcode: {
        required: true
      },
      accountName: {
        required: true
      },
      narr: {
        required: true
      },
      debit: {
        required: true
      },
      billtype: {
        required: true
      },
      cashactcode: {
        required: true
      }
    }
  });  

});


$(document).ready(function() {
  var counter = 0;
  $("#add_Row").on("click", function() {
    var idVal = $('#tab_logic tr:last').find('td:first').html();
    var matches = idVal.match(/\d+/g);
    
    var newRow = $("<tr>");
    var cols = "";
    cols += '<td><select class="form-control sel_sel status" id="accountName' + counter + '" name="accountName" required><option>Select cash account</option><option value="1">TDS A/c 1</option><option value="2">TDS A/c 2</option><option value="3">TDS A/c 3</option></select></td>'
    cols += '<td><input type="text" class="narr form-control required" name="narr'+ counter + '" placeholder="Enter your text here" id="acc_narrat' + counter + '" /></td>';

    cols += '<td><button type="button" class="adRow ibtnDel" style="width:70%;">x</button></a></td>';

    newRow.append(cols);


    var defVal = $("select[name=acctname]").find(":selected").val();
    if (defVal) {
      $("select[name=accountName]").find(`option[value=${defVal}]`).hide();
    }
    $("table.order-list").append(newRow);
    
  counter++;
  });
  $('#contactForm').on('submit', function(event) {
  console.log($('.narr'))
            $('.narr').each(function() {
                $(this).rules("add", 
                    {
                        required: true
                    })
            });
            event.preventDefault();
            if($('#contactForm').validate().form()) {
                alert("validates");
            } else {
                alert("does not validate");
            }
  });
  $('#contactForm').validate();
});
.load {
  border-color: black;
  background-color: plum !important;
}

.load:hover {
  background-color: blue
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.7.5/angular.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.11.1/jquery.validate.min.js"></script>

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
<script src="https://ajax.aspnetcdn.com/ajax/jquery.validate/1.11.0/jquery.validate.min.js" crossorigin="anonymous"></script>

<form id="contactForm" method="get" action="">

  <input type="button" class="add_Row adRow" id="add_Row" value="Add Row">
  <table class="table table-bordered table-hover order-list" id="tab_logic" style="width:60% !important">

    <tbody>
      <tr id="fst_row">
        <td>
          <select class="form-control sel_sel" id="payacc" name="actname" for="actname">
            <option value="">Select TDS A/c name</option>
            <option value="1">TDS A/c 1</option>
            <option value="2">TDS A/c 2</option>
            <option value="3">TDS A/c 3</option>
          </select>
        </td>
        <td>
          <input type="text" class="form-control required" id="pay_narrat" name="narr" placeholder="Enter your text here" />

        </td>
      </tr>
    </tbody>
  </table>


<!-- submit -->
<div class="form-group col-4 vocSub" style="margin-bottom: 0px !important;">
  <div class="col-md-12 cashform_submit" id="">
    <input type="submit" class="btn add-btn submit-btn load cashmainBtn" id="cashSub" th:value="Submit" tabindex="1" value="Submit" />
</form>

  </div>
</div>

答案 1 :(得分：0)

首先，您应该捕获单击“提交”按钮后触发的事件，您可以使用jQuery通过以下方式完成该事件：

$(document).on('submit', **ID or CLASS or ATTRIBUTE of your FORM**, function(event){
  // Logic here
})

如果您在这段代码中return false，提交将停止，因此

$(document).on('submit', **ID or CLASS or ATTRIBUTE of your FORM**, function(event){
     if(!form_is_not_valid()){
        return false;
     } 
     return true;
})
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