在线框架和插件：http://www.bootcdn.cn；
使用boostrarp框架为例：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>bootstrap基础模板</title>
<link href="https://cdn.bootcss.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet"> //css文件
<script src="https://cdn.bootcss.com/jquery/1.12.4/jquery.min.js"></script> //jquery
<script src="https://cdn.bootcss.com/bootstrap/4.0.0/js/bootstrap.min.js"></script> //bootstrap.js
</head>
<body>
</body>
</html>