Bootstrap 4的平滑動畫崩潰

Question

我得到了我想要的東西，但是動畫效果並不理想。 我知道，如果沒有padding ，動畫會更好，但是我需要填充才能獲得設計。 我該如何解決這個問題？

JSFiddle演示

HTML：

<div class="container">
  <div class="row">
    <div class="col-sm-12">
      <div class="block">
            <label class="checkbox"> This is my checkbox
              <input type="checkbox" data-toggle="collapse" data-target="#collapseExample">
            </label>
            <div class="collapse" id="collapseExample">
              <div class="row">
                <div class="col-12">
                  <div class="form-group">
                    <input type="number" class="form-control" placeholder="option one">
                  </div>
                  <div class="form-group">
                    <input type="number" class="form-control" placeholder="option two">
                  </div>
                  <div class="form-group">
                    <input type="number" class="form-control" placeholder="option three">
                  </div>
                </div>
              </div>
            </div>
      </div>
    </div>
  </div>
</div>

CSS：

.block {
  margin-top: 30px;
}
.collapse {
  background-color: #eee;
  padding: 30px 15px;
}

它基於最新版本的Bootstrap 4。

Answer 1

設置.collapse它會先應用.collapse的引導樣式， .collapse再應用.collapse ，因為這會延遲...

使用ID #collapseExample設置樣式：

 .block { margin-top: 30px; } #collapseExample{ background-color: #eee; padding: 30px 15px; } 

  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css"> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js"></script> <div class="container"> <div class="row"> <div class="col-sm-12"> <div class="block"> <label class="checkbox"> This is my checkbox <input type="checkbox" data-toggle="collapse" data-target="#collapseExample"> </label> <div class="collapse" id="collapseExample"> <div class="row"> <div class="col-12"> <div class="form-group"> <input type="number" class="form-control" placeholder="option one"> </div> <div class="form-group"> <input type="number" class="form-control" placeholder="option two"> </div> <div class="form-group"> <input type="number" class="form-control" placeholder="option three"> </div> </div> </div> </div> </div> </div> </div> </div> 

編輯您的評論！

關閉時會出現“拖動”。

使用jQuery onclick的checkbox並應用padding如下： 這里撥弄

 $('.checkbox').on('click', function(){ if($('.collapse.show').length>0) $('.collapse').css('padding','0'); else $('.collapse').css('padding','30px 15px'); }); 

 .block { margin-top: 30px; } #collapseExample{ background-color: #eee; } 

 <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css"> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js"></script> <div class="container"> <div class="row"> <div class="col-sm-12"> <div class="block"> <label class="checkbox"> This is my checkbox <input type="checkbox" data-toggle="collapse" data-target="#collapseExample"> </label> <div class="collapse" id="collapseExample"> <div class="row"> <div class="col-12"> <div class="form-group"> <input type="number" class="form-control" placeholder="option one"> </div> <div class="form-group"> <input type="number" class="form-control" placeholder="option two"> </div> <div class="form-group"> <input type="number" class="form-control" placeholder="option three"> </div> </div> </div> </div> </div> </div> </div> </div> 

Answer 2

我解決了。 這是因為我在父div中添加了padding 。

 .block { margin-top: 30px; } .block__collapse { background-color: #eee; padding: 30px 15px; } 

 <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css"> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js"></script> <div class="container"> <div class="row"> <div class="col-sm-12"> <div class="block"> <label class="checkbox"> This is my checkbox <input type="checkbox" data-toggle="collapse" data-target="#collapseExample"> </label> <div class="collapse" id="collapseExample"> <div class="block__collapse"> <div class="row"> <div class="col-12"> <div class="form-group"> <input type="number" class="form-control" placeholder="option one"> </div> <div class="form-group"> <input type="number" class="form-control" placeholder="option two"> </div> <div class="form-group"> <input type="number" class="form-control" placeholder="option three"> </div> </div> </div> </div> </div> </div> </div> </div> </div>