8.Bootstrap(中文教程)元件：alert提示组件

ㄧ.alert提示组件

<div class="component demo">  <div class="alert alert-primary" role="alert">   <h4>Alert</h4>   hello~ <a href="#" class="alert-link">see more.</a> </div></div>.component.demo{ padding: 50px;}

重点：
1.alert定义为alert，alert-primary为样式，多种样式都在下面的範例
2.使用 .alert-link 来快速为警报中的连结增添合适的色彩。

二.alert的样式

<div class="alert alert-primary" role="alert">  A simple primary alert—check it out!</div><div class="alert alert-secondary" role="alert">  A simple secondary alert—check it out!</div><div class="alert alert-success" role="alert">  A simple success alert—check it out!</div><div class="alert alert-danger" role="alert">  A simple danger alert—check it out!</div><div class="alert alert-warning" role="alert">  A simple warning alert—check it out!</div><div class="alert alert-info" role="alert">  A simple info alert—check it out!</div><div class="alert alert-light" role="alert">  A simple light alert—check it out!</div><div class="alert alert-dark" role="alert">  A simple dark alert—check it out!</div>

codepen
参考：bootstrap4