出现问题，将模态滚动到顶部

问题描述 投票：0回答：2

我正在创建一个代码段，在该代码段中，将模式滚动到顶部位置会出现问题。滚动到顶部模式弹出窗口的目的，我将在其中显示表单验证消息。

我已经尝试过以下jQuery代码。

//Click event to scroll to top
 
$(".signIn-btn").click(function() {
    $("#largeModal").scrollTop(0);
});
.modal-body {
    height: 250px;
    overflow-y: auto;  
}

.modal-body-inner {
  height: 100%;  
}
<!-- Bootstrap CSS -->
<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-3.4.1.slim.min.js" integrity="sha384-J6qa4849blE2+poT4WnyKhv5vZF5SrPo0iEjwBvKU7imGFAV0wwj1yYfoRSJoZ+n" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/umd/popper.min.js" integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js" integrity="sha384-wfSDF2E50Y2D1uUdj0O3uMBJnjuUD4Ih7YwaYd1iqfktj0Uod8GCExl3Og8ifwB6" crossorigin="anonymous"></script>

<div class="container">
	<h1 class="display-4 text-center mb-4">Bootstrap Modal</h1>  
	<div class="row mb-4">
		<div class="col text-center">
		  <h3>The Large Modal</h3>
		  <a href="#" class="btn btn-lg btn-primary" data-toggle="modal" data-target="#largeModal">Click to open Modal</a>
		</div>
	</div>
</div>

<!-- large modal -->
<div class="modal fade" id="largeModal" tabindex="-1" role="dialog" aria-labelledby="basicModal" aria-hidden="true">
  <div class="modal-dialog modal-lg">
    <div class="modal-content">
      <div class="modal-header">
        <h4 class="modal-title" id="myModalLabel">Sign In</h4>
        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
          <span aria-hidden="true">&times;</span>
        </button>
      </div>
      
      <div class="modal-body">        
        <div class="modal-body-inner">
            <p>Modal Message At Top</p>
            <div class="form-row">
              <div class="form-group col-md-6">
                <label for="inputEmail4">Email</label>
                <input type="email" class="form-control" id="inputEmail4" placeholder="Email">
              </div>
              <div class="form-group col-md-6">
                <label for="inputPassword4">Password</label>
                <input type="password" class="form-control" id="inputPassword4" placeholder="Password">
              </div>
            </div>
            <div class="form-group">
              <label for="inputAddress">Address</label>
              <input type="text" class="form-control" id="inputAddress" placeholder="1234 Main St">
            </div>
            <div class="form-group">
              <label for="inputAddress2">Address 2</label>
              <input type="text" class="form-control" id="inputAddress2" placeholder="Apartment, studio, or floor">
            </div>
            <div class="form-row">
              <div class="form-group col-md-6">
                <label for="inputCity">City</label>
                <input type="text" class="form-control" id="inputCity">
              </div>
              <div class="form-group col-md-4">
                <label for="inputState">State</label>
                <select id="inputState" class="form-control">
                  <option selected="">Choose...</option>
                  <option>...</option>
                </select>
              </div>
              <div class="form-group col-md-2">
                <label for="inputZip">Zip</label>
                <input type="text" class="form-control" id="inputZip">
              </div>
            </div>
            <div class="form-group">
              <div class="form-check">
                <input class="form-check-input" type="checkbox" id="gridCheck">
                <label class="form-check-label" for="gridCheck">
                  Check me out
                </label>
              </div>
            </div>
            <button type="submit" class="btn btn-primary signIn-btn">Sign in</button>
        </div>    
      </div>
      
      <div class="modal-footer">
        <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>            
      </div>
    </div>
  </div>
</div>
javascript jquery css bootstrap-4
2个回答
1
投票

您必须使用滚动条指定元素，在这种情况下为.modal-body。尝试用

$(".signIn-btn").click(function() {
    $("#largeModal .modal-body").scrollTop(0);
});
1
投票

由于Bootstrap4为可滚动的modal-dialog-scrollable部分具有预定义的类modal-body，因此，请不要编写用于创建滚动条的自定义CSS。并使用$('#largeModal .modal-body').animate({scrollTop: 0},500);进行模态主体滚动到顶部。文件：https://getbootstrap.com/docs/4.4/components/modal/#scrolling-long-content注意：在Full page模式下的以下代码段中检查此。我希望下面的代码片段能对您有所帮助。

$(document).on('submit', '#formID', function(){
  $('#largeModal .modal-body').animate({
    scrollTop: 0
  },500);

  return false;
});
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css">
<script src="https://code.jquery.com/jquery-3.4.1.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/umd/popper.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"></script>

<div class="container">
  <h1 class="display-4 text-center mb-4">Bootstrap Modal</h1>  
  <div class="row mb-4">
    <div class="col text-center">
      <h3>The Large Modal</h3>
      <a href="#" class="btn btn-lg btn-primary" data-toggle="modal" data-target="#largeModal">Click to open Modal</a>
    </div>
  </div>
</div>


<!-- large modal -->
<div class="modal fade" id="largeModal" tabindex="-1" role="dialog" aria-labelledby="basicModal" aria-hidden="true">
  <div class="modal-dialog modal-lg modal-dialog-scrollable">
    <form action="#" method="post" class="modal-content" id="formID">
      <div class="modal-header bg-light">
        <h4 class="modal-title" id="myModalLabel">Sign In</h4>
        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
          <span aria-hidden="true">&times;</span>
        </button>
      </div>      
      <div class="modal-body">        
        <div class="modal-body-inner">
          <div class="alert alert-danger" role="alert">
            <strong>Modal Message At Top</strong>
            A simple danger alert—check it out!
          </div>

          <div class="form-row">
            <div class="form-group col-md-6">
              <label for="inputEmail4">Email</label>
              <input type="email" class="form-control" id="inputEmail4" placeholder="Email">
            </div>
            <div class="form-group col-md-6">
              <label for="inputPassword4">Password</label>
              <input type="password" class="form-control" id="inputPassword4" placeholder="Password">
            </div>
          </div>
          <div class="form-group">
            <label for="inputAddress">Address</label>
            <input type="text" class="form-control" id="inputAddress" placeholder="1234 Main St">
          </div>
          <div class="form-group">
            <label for="inputAddress2">Address 2</label>
            <input type="text" class="form-control" id="inputAddress2" placeholder="Apartment, studio, or floor">
          </div>
          <div class="form-row">
            <div class="form-group col-md-6">
              <label for="inputCity">City</label>
              <input type="text" class="form-control" id="inputCity">
            </div>
            <div class="form-group col-md-4">
              <label for="inputState">State</label>
              <select id="inputState" class="form-control">
                <option selected="">Choose...</option>
                <option>...</option>
              </select>
            </div>
            <div class="form-group col-md-2">
              <label for="inputZip">Zip</label>
              <input type="text" class="form-control" id="inputZip">
            </div>
          </div>          
          <div class="form-group">
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            tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam,
            quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo
            consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse
            cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non
            proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
            Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod
            tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam,
            quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo
            consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse
            cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non
            proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
            Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod
            tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam,
            quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo
            consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse
            cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non
            proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
            Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod
            tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam,
            quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo
            consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse
            cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non
            proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
          </div>
          <div class="form-group">
            <div class="form-check">
              <input class="form-check-input" type="checkbox" id="gridCheck">
              <label class="form-check-label" for="gridCheck">
                Check me out
              </label>
            </div>
          </div>
        </div>    
      </div>
      <div class="modal-footer justify-content-start w-100">
        <button type="submit" class="btn btn-primary px-4 signIn-btn">Sign in</button>
        <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>   
      </div>
    </form>
  </div>
</div>
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