Question

<div class="alert alert-success alert-dissmissable" role="alert">  <button type="button" class="close" data-dismiss="alert">
<span aria-hidden="true">&times;</span>
</button>
This is a success alert
</div>

我尝试按照教程进行操作，但是即使尝试了一些更改，它似乎也无法正常工作

Answer 1

您是否将必需的meta标签放在head元素中，因为当我尝试您的代码时，它对我有用。当我单击十字按钮时，警报消失了。如果您没有在head标签中添加对bootstrap库的引用，请按如下所示添加它。

    <meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" 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>

有关更多信息，请访问此网站https://getbootstrap.com/docs/4.4/getting-started/introduction/。

当我按下警报按钮时，它不会关闭警报

1 个答案: