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20 登录页面
html代码
<!DOCTYPE html><html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1"> <!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags --> <meta name="description" content=""> <meta name="author" content=""> <link rel="icon" href="../../favicon.ico"> <title>Signin Template for Bootstrap</title> <!-- Bootstrap core CSS --> <link href="../../dist/css/bootstrap.min.css" rel="stylesheet"> <!-- Custom styles for this template --> <link href="signin.css" rel="stylesheet"> <!-- Just for debugging purposes. Don‘t actually copy these 2 lines! --> <!--[if lt IE 9]><script src="http://www.mamicode.com/assets/js/ie8-responsive-file-warning.js"></script><![endif]--> <script src="../../assets/js/ie-emulation-modes-warning.js"></script> <!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries --> <!--[if lt IE 9]> <script src="https://oss.maxcdn.com/html5shiv/3.7.2/html5shiv.min.js"></script> <script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script> <![endif]--> </head> <body> <div class="container"> <form class="form-signin"> <h2 class="form-signin-heading">Please sign in</h2> <label for="inputEmail" class="sr-only">Email address</label> <input type="email" id="inputEmail" class="form-control" placeholder="Email address" required autofocus> <label for="inputPassword" class="sr-only">Password</label> <input type="password" id="inputPassword" class="form-control" placeholder="Password" required> <div class="checkbox"> <label> <input type="checkbox" value="remember-me"> Remember me </label> </div> <button class="btn btn-lg btn-primary btn-block" type="submit">Sign in</button> </form> </div> <!-- /container --> <!-- IE10 viewport hack for Surface/desktop Windows 8 bug --> <script src="../../assets/js/ie10-viewport-bug-workaround.js"></script> </body></html>
css 代码：
body { padding-top: 40px; padding-bottom: 40px; background-color: #eee;}.form-signin { max-width: 330px; padding: 15px; margin: 0 auto;}.form-signin .form-signin-heading,.form-signin .checkbox { margin-bottom: 10px;}.form-signin .checkbox { font-weight: normal;}.form-signin .form-control { position: relative; height: auto; -webkit-box-sizing: border-box; -moz-box-sizing: border-box; box-sizing: border-box; padding: 10px; font-size: 16px;}.form-signin .form-control:focus { z-index: 2;}.form-signin input[type="email"] { margin-bottom: -1px; border-bottom-right-radius: 0; border-bottom-left-radius: 0;}.form-signin input[type="password"] { margin-bottom: 10px; border-top-left-radius: 0; border-top-right-radius: 0;}1. <input type="email" id="inputEmail" class="form-control" placeholder="Email address" required autofocus>
autofocus 属性规定当页面加载时 input 元素应该自动获得焦点。
如果使用该属性，则 input 元素会获得焦点。
required 属性规定必需在提交之前填写输入字段。
如果使用该属性，则字段是必填（或必选）的。
2
| autofocus | autofocus | 规定输入字段在页面加载时是否获得焦点。 （不适用于 type="hidden"） |
20 登录页面
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