我正在尝试将我的网站的登录和注册表单实现为引导模式，但是单击导航栏内的链接后，该模式根本不显示。之前，我曾在此主题上遇到过几个类似的问题，但是似乎没有一个解决方案对我有用。包含了JQuery，所以我不知道是什么导致模态显得胆怯。有人可以帮忙吗？代码如下：
<!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">
<!-- CSRF Token -->
<meta name="csrf-token" content="Mc8MyxbLVQ93MY1dMlbE6y9NXzlTiVrVB80P0lYl">
<link rel="stylesheet" href="http://mypage.me/css/app.css">
<title>MyPage</title>
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-
q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js"
integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1"
crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js"
integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM"
crossorigin="anonymous"></script>
<style>
body, html {
height: 100%;
margin: 0;
}
.bg {
/* The image used */
background-image: url("/images/ukay3.jpg");
/* Full height */
height: 100%;
/* Center and scale the image nicely */
background-position: center;
background-repeat: no-repeat;
background-size: cover;
}
.navbar { margin-bottom: 0 !important; }
</style>
</head>
<body>
<a class="nav-link" href="#" data-toggle="modal" data-target="#loginModal">Logi</a>
<!-- Old Navbar -->
<nav class="navbar navbar-inverse">
<div class="container-fluid">
<!-- Section: Logo and collapse button -->
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a style="display:block; margin:7px; margin-right:20px" href="/ " class="pull-left"><img
src="/images/logosmall.png" alt="Not found!"></a>
</div><!-- End Section: Logo and collapse button -->
<!-- Section: Collapsible part of Navbar -->
<div class="collapse navbar-collapse" id="myNavbar">
<ul class="nav navbar-nav">
<li><a href="/">Home</a></li>
<li><a href="/posts">Market</a></li>
<li class="dropdown">
<a class="dropdown-toggle" data-toggle="dropdown" href="/about">About<span class="caret">
</span></a>
<ul class="dropdown-menu">
<li><a href="/about">Page1</a></li>
<li><a href="/about">Page2</a></li>
<li><a href="/about">Page3</a></li>
</ul>
</li>
<!--<li><a href="/about">About</a></li>-->
<li><a href="/services">Services</a></li>
<li><a href="/contact">Contact</a></li>
</ul>
<!-- Section: Right side of Navbar -->
<!-- Right Side Of Navbar -->
<ul class="nav navbar-nav navbar-right">
<!-- Authentication Links -->
<li class="nav-item">
<a class="nav-link" href="#" data-toggle="modal" data-target="#loginModal"><span
class="glyphicon glyphicon-log-in"></span> Login</a>
</li>
<li class="nav-item">
<a class="nav-link" href="http://mypage.me/register"><span class="glyphicon
glyphicon-user"></span> Sign Up</a>
</li>
</ul><!-- Right Side of Navbar --><!-- End Section: Right side of Navbar -->
</div><!-- End Section: Collapsible part of Navbar -->
</div>
</nav>
<!-- Login Modal -->
<div class="modal fade" id="loginModal" role="dialog">
<div class="modal-dialog">
<!-- Modal content-->
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">×</button>
<h4 class="modal-title">Modal Header</h4>
</div>
<div class="modal-body">
<p>Some text in the modal.</p>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
</div>
</div>
</div>
</div>
<!-- Modal End --> <div class="bg"></div>
<div class="container">
<div class="jumbotron text-center">
<h1>Welcome to MyPage.com</h1>
</div>
</div>
</body>
</html>
答案 0 :(得分：0)
<!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">
<!-- CSRF Token -->
<meta name="csrf-token" content="Mc8MyxbLVQ93MY1dMlbE6y9NXzlTiVrVB80P0lYl">
<link rel="stylesheet" href="http://mypage.me/css/app.css">
<title>MyPage</title>
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-
q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js"
integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1"
crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js"
integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM"
crossorigin="anonymous"></script>
<style>
body, html {
height: 100%;
margin: 0;
}
.bg {
/* The image used */
background-image: url("/images/ukay3.jpg");
/* Full height */
height: 100%;
/* Center and scale the image nicely */
background-position: center;
background-repeat: no-repeat;
background-size: cover;
}
.navbar { margin-bottom: 0 !important; }
</style>
</head>
<body>
<a class="nav-link" href="#" data-toggle="modal" data-target="#loginModal">Logi</a>
<!-- Old Navbar -->
<nav class="navbar navbar-inverse">
<div class="container-fluid">
<!-- Section: Logo and collapse button -->
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a style="display:block; margin:7px; margin-right:20px" href="/ " class="pull-left"><img
src="/images/logosmall.png" alt="Not found!"></a>
</div><!-- End Section: Logo and collapse button -->
<!-- Section: Collapsible part of Navbar -->
<div class="collapse navbar-collapse" id="myNavbar">
<ul class="nav navbar-nav">
<li><a href="/">Home</a></li>
<li><a href="/posts">Market</a></li>
<li class="dropdown">
<a class="dropdown-toggle" data-toggle="dropdown" href="/about">About<span class="caret">
</span></a>
<ul class="dropdown-menu">
<li><a href="/about">Page1</a></li>
<li><a href="/about">Page2</a></li>
<li><a href="/about">Page3</a></li>
</ul>
</li>
<!--<li><a href="/about">About</a></li>-->
<li><a href="/services">Services</a></li>
<li><a href="/contact">Contact</a></li>
</ul>
<!-- Section: Right side of Navbar -->
<!-- Right Side Of Navbar -->
<ul class="nav navbar-nav navbar-right">
<!-- Authentication Links -->
<li class="nav-item">
<a class="nav-link" href="#loginModal" data-toggle="modal" data-target="#loginModal"><span
class="glyphicon glyphicon-log-in"></span> Login</a>
</li>
<li class="nav-item">
<a class="nav-link" href="http://mypage.me/register"><span class="glyphicon
glyphicon-user"></span> Sign Up</a>
</li>
</ul><!-- Right Side of Navbar --><!-- End Section: Right side of Navbar -->
</div><!-- End Section: Collapsible part of Navbar -->
</div>
</nav>
<!-- Login Modal -->
<div class="modal fade" id="loginModal" role="dialog">
<div class="modal-dialog">
<!-- Modal content-->
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">×</button>
<h4 class="modal-title">Modal Header</h4>
</div>
<div class="modal-body">
<p>Some text in the modal.</p>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
</div>
</div>
</div>
</div>
<!-- Modal End --> <div class="bg"></div>
<div class="container">
<div class="jumbotron text-center">
<h1>Welcome to MyPage.com</h1>
</div>
</div>
</body>
</html>
答案 1 :(得分：0)
好像您的CDN不支持您的代码，我在下面添加了bootstrap4的CDN
<!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">
<!-- CSRF Token -->
<meta name="csrf-token" content="Mc8MyxbLVQ93MY1dMlbE6y9NXzlTiVrVB80P0lYl">
<link rel="stylesheet" href="http://mypage.me/css/app.css">
<title>MyPage</title>
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js"></script>
<style>
body, html {
height: 100%;
margin: 0;
}
.bg {
/* The image used */
background-image: url("/images/ukay3.jpg");
/* Full height */
height: 100%;
/* Center and scale the image nicely */
background-position: center;
background-repeat: no-repeat;
background-size: cover;
}
.navbar { margin-bottom: 0 !important; }
</style>
</head>
<body>
<a class="nav-link" href="#" data-toggle="modal" data-target="#loginModal">Logi</a>
<!-- Old Navbar -->
<nav class="navbar navbar-inverse">
<div class="container-fluid">
<!-- Section: Logo and collapse button -->
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a style="display:block; margin:7px; margin-right:20px" href="/ " class="pull-left"><img
src="/images/logosmall.png" alt="Not found!"></a>
</div><!-- End Section: Logo and collapse button -->
<!-- Section: Collapsible part of Navbar -->
<div class="collapse navbar-collapse" id="myNavbar">
<ul class="nav navbar-nav">
<li><a href="/">Home</a></li>
<li><a href="/posts">Market</a></li>
<li class="dropdown">
<a class="dropdown-toggle" data-toggle="dropdown" href="/about">About<span class="caret">
</span></a>
<ul class="dropdown-menu">
<li><a href="/about">Page1</a></li>
<li><a href="/about">Page2</a></li>
<li><a href="/about">Page3</a></li>
</ul>
</li>
<!--<li><a href="/about">About</a></li>-->
<li><a href="/services">Services</a></li>
<li><a href="/contact">Contact</a></li>
</ul>
<!-- Section: Right side of Navbar -->
<!-- Right Side Of Navbar -->
<ul class="nav navbar-nav navbar-right">
<!-- Authentication Links -->
<li class="nav-item">
<a class="nav-link" href="#" data-toggle="modal" data-target="#loginModal"><span
class="glyphicon glyphicon-log-in"></span> Login</a>
</li>
<li class="nav-item">
<a class="nav-link" href="http://mypage.me/register"><span class="glyphicon
glyphicon-user"></span> Sign Up</a>
</li>
</ul><!-- Right Side of Navbar --><!-- End Section: Right side of Navbar -->
</div><!-- End Section: Collapsible part of Navbar -->
</div>
</nav>
<!-- Login Modal -->
<div class="modal fade" id="loginModal" role="dialog">
<div class="modal-dialog">
<!-- Modal content-->
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">×</button>
<h4 class="modal-title">Modal Header</h4>
</div>
<div class="modal-body">
<p>Some text in the modal.</p>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
</div>
</div>
</div>
</div>
<!-- Modal End --> <div class="bg"></div>
<div class="container">
<div class="jumbotron text-center">
<h1>Welcome to MyPage.com</h1>
</div>
</div>
</body>
</html>
答案 2 :(得分：0)
将引导css添加到head的{{1}}中：html
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">
答案 3 :(得分：0)
只需将其添加到标题中即可。
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">
答案 4 :(得分：0)
尝试将bootstarp css文件导入到app.css之前的头部。 像这样
<!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">
<!-- CSRF Token -->
<meta name="csrf-token" content="Mc8MyxbLVQ93MY1dMlbE6y9NXzlTiVrVB80P0lYl">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css"
integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<link rel="stylesheet" href="http://mypage.me/css/app.css">
<title>MyPage</title>
<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js"
integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo"
crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js"
integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1"
crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js"
integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM"
crossorigin="anonymous"></script>
<style>
body,
html {
height: 100%;
margin: 0;
}
.bg {
/* The image used */
background-image: url("/images/ukay3.jpg");
/* Full height */
height: 100%;
/* Center and scale the image nicely */
background-position: center;
background-repeat: no-repeat;
background-size: cover;
}
.navbar {
margin-bottom: 0 !important;
}
</style>
</head>
<body>
<a class="nav-link" href="#" data-toggle="modal" data-target="#loginModal">Logi</a>
<!-- Old Navbar -->
<nav class="navbar navbar-inverse">
<div class="container-fluid">
<!-- Section: Logo and collapse button -->
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a style="display:block; margin:7px; margin-right:20px" href="/ " class="pull-left"><img
src="/images/logosmall.png" alt="Not found!"></a>
</div><!-- End Section: Logo and collapse button -->
<!-- Section: Collapsible part of Navbar -->
<div class="collapse navbar-collapse" id="myNavbar">
<ul class="nav navbar-nav">
<li><a href="/">Home</a></li>
<li><a href="/posts">Market</a></li>
<li class="dropdown">
<a class="dropdown-toggle" data-toggle="dropdown" href="/about">About<span class="caret">
</span></a>
<ul class="dropdown-menu">
<li><a href="/about">Page1</a></li>
<li><a href="/about">Page2</a></li>
<li><a href="/about">Page3</a></li>
</ul>
</li>
<!--<li><a href="/about">About</a></li>-->
<li><a href="/services">Services</a></li>
<li><a href="/contact">Contact</a></li>
</ul>
<!-- Section: Right side of Navbar -->
<!-- Right Side Of Navbar -->
<ul class="nav navbar-nav navbar-right">
<!-- Authentication Links -->
<li class="nav-item">
<a class="nav-link" href="#" data-toggle="modal" data-target="#loginModal"><span
class="glyphicon glyphicon-log-in"></span> Login</a>
</li>
<li class="nav-item">
<a class="nav-link" href="http://mypage.me/register"><span class="glyphicon
glyphicon-user"></span> Sign Up</a>
</li>
</ul><!-- Right Side of Navbar -->
<!-- End Section: Right side of Navbar -->
</div><!-- End Section: Collapsible part of Navbar -->
</div>
</nav>
<!-- Login Modal -->
<div class="modal fade" id="loginModal" role="dialog">
<div class="modal-dialog">
<!-- Modal content-->
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">×</button>
<h4 class="modal-title">Modal Header</h4>
</div>
<div class="modal-body">
<p>Some text in the modal.</p>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
</div>
</div>
</div>
</div>
<!-- Modal End -->
<div class="bg"></div>
<div class="container">
<div class="jumbotron text-center">
<h1>Welcome to MyPage.com</h1>
</div>
</div>
</body>
</html>
答案 5 :(得分：0)
在当前代码中链接bootstrap.min.css文件，并在模式html部分定义适当的类。检查下面的代码，它工作正常...
<!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" />
<!-- CSRF Token -->
<meta name="csrf-token" content="Mc8MyxbLVQ93MY1dMlbE6y9NXzlTiVrVB80P0lYl" />
<link rel="stylesheet" href="http://mypage.me/css/app.css">
<title>MyPage</title>
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-
q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js"
integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1"
crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js"
integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM"
crossorigin="anonymous"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
<style>
body, html {
height: 100%;
margin: 0;
}
.bg {
/* The image used */
background-image: url("/images/ukay3.jpg");
/* Full height */
height: 100%;
/* Center and scale the image nicely */
background-position: center;
background-repeat: no-repeat;
background-size: cover;
}
.navbar { margin-bottom: 0 !important; }
</style>
</head>
<body>
<!-- Old Navbar -->
<nav class="navbar navbar-inverse">
<div class="container-fluid">
<!-- Section: Logo and collapse button -->
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a style="display:block; margin:7px; margin-right:20px" href="/ " class="pull-left"><img
src="/images/logosmall.png" alt="Not found!"></a>
</div><!-- End Section: Logo and collapse button -->
<!-- Section: Collapsible part of Navbar -->
<div class="collapse navbar-collapse" id="myNavbar">
<ul class="nav navbar-nav">
<li><a href="/">Home</a></li>
<li><a href="/posts">Market</a></li>
<li class="dropdown">
<a class="dropdown-toggle" data-toggle="dropdown" href="/about">About<span class="caret">
</span></a>
<ul class="dropdown-menu">
<li><a href="/about">Page1</a></li>
<li><a href="/about">Page2</a></li>
<li><a href="/about">Page3</a></li>
</ul>
</li>
<!--<li><a href="/about">About</a></li>-->
<li><a href="/services">Services</a></li>
<li><a href="/contact">Contact</a></li>
</ul>
<!-- Section: Right side of Navbar -->
<!-- Right Side Of Navbar -->
<ul class="nav navbar-nav navbar-right">
<!-- Authentication Links -->
<li class="nav-item">
<a class="nav-link" href="#" data-toggle="modal" data-target="#loginModal"><span
class="glyphicon glyphicon-log-in"></span> Login</a>
</li>
<li class="nav-item">
<a class="nav-link" href="http://mypage.me/register"><span class="glyphicon
glyphicon-user"></span> Sign Up</a>
</li>
</ul><!-- Right Side of Navbar --><!-- End Section: Right side of Navbar -->
</div><!-- End Section: Collapsible part of Navbar -->
</div>
</nav>
<!-- Login Modal -->
<div class="modal" id="loginModal" role="dialog">
<div class="modal-dialog">
<!-- Modal content-->
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">×</button>
<h4 class="modal-title">Modal Header</h4>
</div>
<div class="modal-body">
<p>Some text in the modal.</p>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
</div>
</div>
</div>
</div>
<!-- Modal End --> <div class="bg"></div>
<div class="container">
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<h1>Welcome to Mohd. Aslam</h1>
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