阅读以下消息。 然后为它们中的每一个添加适当的警报类。
<div class="@(19)">
This alert box could indicate a successful or positive action.
</div>
<div class="@(16)">
This alert box could indicate a neutral informative change or action.
</div>
<div class="@(19)">
This alert box could indicate a warning that might need attention.
</div>
<div class="@(18)">
This alert box could indicate a dangerous or potentially negative action.
</div>
<div class="alert alert-success">
This alert box could indicate a successful or positive action.
</div>
<div class="alert alert-info">
This alert box could indicate a neutral informative change or action.
</div>
<div class="alert alert-warning">
This alert box could indicate a warning that might need attention.
</div>
<div class="alert alert-danger">
This alert box could indicate a dangerous or potentially negative action.
</div>