使用Bootstrap需要引入官方的文件
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>Bootstrap3示例</title> <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"> </head> <body> <!-- 这里是具体的网页内容 --> <!-- bootstrap的核心js文件 --> <script src="https://cdn.bootcss.com/jquery/1.12.4/jquery.min.js"></script> <script src="https://cdn.bootcss.com/bootstrap/3.3.7/js/bootstrap.min.js"></script> </body> </html>
如果更完善一点的话，参照官网是：
<!DOCTYPE html> <html lang="zh-CN"> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <meta name="description" content="我是前端开发者"> <meta name="keywords" content="javascript,vueJS,Jquery,AngularJS,HTML5,CSS3"> <meta name="author" content="李金芝"> <title>Bootstrap3示例</title> <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"> </head> <body> <!-- 这里是具体的网页内容 --> <!-- bootstrap的核心js文件 --> <script src="https://cdn.bootcss.com/jquery/1.12.4/jquery.min.js"></script> <script src="https://cdn.bootcss.com/bootstrap/3.3.7/js/bootstrap.min.js"></script> </body> </html>