Bootstrap折叠动画不顺畅

Question

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script>
<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
<div class="form-group">
    <a for="collapseOne" data-toggle="collapse" href="#collapseOne" aria-expanded="true" aria-controls="collapseOne" class="btn btn-primary">+ addInfo </a>
    <textarea class="form-control collapse" id="collapseOne" rows="4"></textarea>
</div>

<div class="form-group">
    <a for="collapseTwo" data-toggle="collapse" href="#collapseTwo" aria-expanded="true" aria-controls="collapseOne" class="btn btn-info">+ subtitle </a>
    <input type="text" class="form-control collapse" id="collapseTwo">
</div>

问题是当单击addInfo选项卡时,您可以在扩展中找到跳转text_area,即动画不平滑.

Answer 1

如果有其他人遇到这个问题,就像我刚才所说的那样,答案是将要折叠的内容包装在内部div并折叠包装div而不是内容本身.

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script>
<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />

<div class="form-group">
    <a for="collapseOne" data-toggle="collapse" href="#collapseOne" aria-expanded="true" aria-controls="collapseOne" class="btn btn-primary">+ addInfo</a>
    <div id="collapseOne" class="collapse">
        <textarea class="form-control" rows="4"></textarea>
    </div>
</div>

<div class="form-group">
    <a for="collapseTwo" data-toggle="collapse" href="#collapseTwo" aria-expanded="true" aria-controls="collapseOne" class="btn btn-info">+ subtitle</a>
    <input type="text" class="form-control collapse" id="collapseTwo">
</div>

Answer 2

当父div".collapse"有填充时,就会发生Jerking.

填充在子div上,而不是父级.jQuery是动画高度,而不是填充.

例:

  <div class="form-group">
       <a for="collapseOne" data-toggle="collapse" href="#collapseOne" aria-expanded="true" aria-controls="collapseOne">+ addInfo</a>
       <div class="collapse" id="collapseOne" style="padding: 0;">
          <textarea class="form-control" rows="4" style="padding: 20px;"></textarea>
       </div>
  </div>

  <div class="form-group">
    <a for="collapseTwo" data-toggle="collapse" href="#collapseTwo" aria-expanded="true" aria-controls="collapseOne">+ subtitle</a>
    <input type="text" class="form-control collapse" id="collapseTwo">
  </div>

小提琴显示两者

希望这可以帮助.

Answer 3

添加到@CR Rollyson 的答案中，

如果您有一个具有 min-height 属性的可折叠 div，它也会导致抽搐。尝试从可直接折叠的 div 中删除该属性。在可折叠 div 的子 div 中使用它。

<div class="form-group">
    <a for="collapseOne" data-toggle="collapse" href="#collapseOne" aria-expanded="true" aria-controls="collapseOne">+ Not Jerky</a>
    <div class="collapse" id="collapseOne" style="padding: 0;">
        <textarea class="form-control" rows="4" style="padding: 20px;">No padding on animated element. Padding on child.</textarea>
    </div>
</div>

小提琴

Answer 4

我认为可能有几种情况会导致抽搐。在我的示例中，问题涉及非动画子级的底部边距（即使动画父级没有边距/填充）。移除边距后，动画变得平滑。

<div class="form-group">
    <a for="collapseJerky" data-toggle="collapse" href="#collapseJerky" aria-expanded="true" aria-controls="collapseJerky">+ Jerky</a>
    <div class="collapse" id="collapseJerky" style="margin:0; padding: 0;">
        <textarea class="form-control" rows="4" style="margin-bottom: 20px;">No margin or padding on animated element. Margin on child.</textarea>
    </div>
</div>
<div class="form-group">
    <a data-toggle="collapse" href="#collapseNotJerky" aria-expanded="true" aria-controls="collapseNotJerky">+ Not Jerky</a>
    <div class="collapse" id="collapseNotJerky" style="margin:0 padding: 0;">
        <textarea class="form-control" rows="4" style="margin-bottom: 0;">No margin or padding on animated element or on child.</textarea>
    </div>
</div>
<p>
    Moles and trolls, moles and trolls, work, work, work, work, work. We never see the light of day. This is just content below the "Not Jerky" to show that the animation is smooth.
</p>

小提琴

Answer 5

折叠 div 周围的内边距必须为 0