如何从 Bootstrap 模态窗口中移除滑动效果
答案：从模态窗口中移除 fade 类
默认情况下，在激活时，Bootstrap 模态窗口会在短暂的向下滑动过渡后显示。 但是，如果您不喜欢这样并想删除动画，只需从 .modal 元素中取出 fade 类。 让我们尝试一个例子来看看它是如何工作的：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Remove Slide Animation from Bootstrap Modals</title>
<link rel="stylesheet" href="css/bootstrap.min.css">
<script src="js/jquery-3.5.1.min.js"></script>
<script src="js/bootstrap.min.js"></script>
</head>
<body>
<!-- 按钮 HTML (触发模态) -->
<a href="#myModal" class="btn btn-primary btn-lg" data-toggle="modal">Launch Demo Modal</a>
<!-- 模态 HTML -->
<div id="myModal" class="modal">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title">Confirmation</h5>
<button type="button" class="close" data-dismiss="modal">×</button>
</div>
<div class="modal-body">
<p>Do you want to save changes you made to document before closing?</p>
<p class="text-warning"><small>If you don't save, your changes will be lost.</small></p>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
<button type="button" class="btn btn-primary">Save changes</button>
</div>
</div>
</div>
</div>
</body>
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