在 Bootstrap 4 中从底部向上滑动的模态

Question

我正在尝试设置一个从底部向上滑动的模式，但没有真正有效的 Bootstrap 4 教程。这是一个尝试：

JSFiddle DEMO

HTML

<button type="submit" class="btn btn-block btn-default footer__btn" data-toggle="modal" data-target="#myModal2"> Open Modal</button>
<div class="modal fade" id="myModal2" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-body">
        Body of the modal.
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
      </div>
    </div>
  </div>
</div>

CSS

.modal.fade .modal-dialog {
    -webkit-transform: translate(0,100%);
    -ms-transform: translate(0,100%);
    -o-transform: translate(0,100%);
    transform: translate(0,100%);
}

Answer 1

由于您不想在 Bootstrap 4 之上添加另一个框架，我只是更改了 CSS：

.animate-bottom {
  position: relative;
  animation: animatebottom 0.4s;
}

@keyframes animatebottom {
  from {
    bottom: -300px;
    opacity: 0;
  }

  to {
    bottom: 0;
    opacity: 1;
  }
}

然后在<div>中的modal-content之后添加类animate-bottom

<button type="submit" class="btn btn-block btn-default footer__btn" data-toggle="modal" data-target="#myModal2"> Open Modal</button>
<div class="modal fade animate" id="myModal2" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
  <div class="modal-dialog" role="document">
    <div class="modal-content animate-bottom"> <!-- Here you have the juicy hahah -->
      <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
        <h4 class="modal-title" id="myModalLabel"> ABOUT </h4>
      </div>
      <div class="modal-body">
        CONTEÚDO
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>

      </div>
    </div>
  </div>
</div>

这是小提琴：

JSFiddle DEMO

确保你让它跨浏览器，但这只是动画的基础，希望它符合你的要求。

Answer 2

我会使用带有模态动画的 W3CSS 框架，它看起来像这样，希望对您有所帮助：

HTML：

<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
<button type="submit" class="btn btn-block btn-default footer__btn" data-toggle="modal" data-target="#myModal2"> Open Modal</button>
<div class="modal fade" id="myModal2" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
  <div class="modal-dialog" role="document">
    <div class="modal-content w3-animate-bottom">
      <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
        <h4 class="modal-title" id="myModalLabel"> ABOUT </h4>
      </div>
      <div class="modal-body">
        CONTEÚDO
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>

      </div>
    </div>
  </div>
</div>

CSS：

.modal.fade .modal-dialog {
    -webkit-transform: translate(0,100%);
    -ms-transform: translate(0,100%);
    -o-transform: translate(0,100%);
    transform: translate(0,100%);
}

JSFiddle DEMO

Answer 3

Based on this answer:

.modal.fade .modal-dialog {
  transform: translate3d(0, 100vh, 0);
}

.modal.show .modal-dialog {
  transform: translate3d(0, 0, 0);
}