简单教程
提交运行
代码编辑器：
<meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="/static/lib/bootstrap/4.0.0/css/bootstrap.min.css"> <script src="/static/lib/jquery/3.3.1/jquery.min.js"></script> <script src="/static/lib/popper.js/1.12.9/umd/popper.min.js"></script> <script src="/static/lib/bootstrap/4.0.0/js/bootstrap.min.js"></script> <div class="container"> <h1>Font weight and italics</h1> <p class="font-weight-bold">Bold text.</p> <p class="font-weight-normal">Normal weight text.</p> <p class="font-weight-light">Light weight text.</p> <p class="font-italic">Italic text.</p> </div>
运行结果：