將模態滾動到頂部時遇到問題

Question

我正在創建一個代碼片段，我在將模態滾動到頂部位置時遇到問題。 滾動到頂部模態彈出窗口的目的，我將在其中顯示表單驗證消息。

我已經嘗試了以下 jQuery 代碼。

 //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/popper.js@1.16.0/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>

Answer 1

您必須使用滾動條指定元素，在本例中為.modal-body 。 試試看

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

Answer 2

不要編寫自定義 css 來創建滾動條，因為 Bootstrap4 為modal-body部分modal-dialog-scrollable預定義了類modal-dialog-scrollable 。
並使用$('#largeModal .modal-body').animate({scrollTop: 0},500); 對於 modal-body 滾動到頂部。
文檔： https : //getbootstrap.com/docs/4.4/components/modal/#scrolling-long-content

注意：在Full page模式下檢查以下代碼段。

我希望下面的片段會對你有很大幫助。

 $(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/popper.js@1.16.0/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"> Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. 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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>