转自：https://v4.bootcss.com/docs/4.0/examples/sign-in/
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<meta name="description" content="">
<meta name="author" content="">
<title>Signin Template for Bootstrap</title>
<link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css">
<!-- Custom styles for this template -->
<style>
html,
body {height: 100%;}
body {display: -ms-flexbox;display: -webkit-box;display: flex;-ms-flex-align: center;-ms-flex-pack: center;-webkit-box-align: center;align-items: center;-webkit-box-pack: center;justify-content: center;padding-top: 40px;padding-bottom: 40px;background-color: #f5f5f5;}
.form-signin {width: 100%;max-width: 330px;padding: 15px;margin: 0 auto;}
.form-signin .checkbox {font-weight: 400;}
.form-signin .form-control {position: relative;box-sizing: border-box;height: auto;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;}
</style>
</head>
<body class="text-center">
<form class="form-signin">
<h1 class="h3 mb-3 font-weight-normal">Please sign in</h1>
<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 mb-3">
<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>
<p class="mt-5 mb-3 text-muted">© 2017-2018</p>
</form>
</body>
</html>
编辑时间：2019年2月19日
修改以后(修改时间：2019年2月20日)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<meta name="description" content="">
<meta name="author" content="">
<title>Signin Template for Bootstrap</title>
<link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css">
<!-- Custom styles for this template -->
<style>
html,
body {height: 100%;}
body {display: -ms-flexbox;display: -webkit-box;display: flex;-ms-flex-align: center;-ms-flex-pack: center;-webkit-box-align: center;align-items: center;-webkit-box-pack: center;justify-content: center;padding-top: 40px;padding-bottom: 40px;background-color: #f5f5f5;}
.form-signin {width: 100%;max-width: 330px;padding: 15px;margin: 0 auto;}
.form-signin .checkbox {font-weight: 400;}
.form-signin .form-control {position: relative;box-sizing: border-box;height: auto;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;}
</style>
</head>
<body class="text-center">
<form class="form-signin">
<h1 class="h3 mb-3 font-weight-normal">用户登录</h1>
<input type="email" id="inputEmail" class="form-control" placeholder="Email address" required autofocus>
<input type="password" id="inputPassword" class="form-control" placeholder="Password" required>
<div class="checkbox mb-3">
<input type="checkbox" value="remember-me" id="remember"><label for="remember">Remember me</label>
</div>
<button class="btn btn-lg btn-primary btn-block" type="submit">Sign in</button>
</form>
<script src="js/jquery-1.8.3.min.js"></script>
<script>
$(function(){
$('#remember').click(function(e) {
if($("#remember").is(':checked')){
console.log($(this).val());
}else {
return;
}
});
});
</script>
</body>
</html>