我正在尝试在向下/向上滚动时隐藏/显示Bootstrap导航栏,但似乎无效。我卡住了,真的很需要帮助。有人能告诉我我做错了什么吗?请记住,我正在学习如何使用Bootstrap,对jQuery知之甚少。
当我用浏览器控制台检查代码时,没有显示任何错误。
我还尝试了fadeIn和fadeOut以及addClass和removeClass函数,但没有成功。
$(document).ready(function() {
var banner = $("#navscroll");
$(window).scroll(function() {
var scroll = $(window).scrollTop();
if (scroll >= banner.height()) {
$("#banner").hide();
} else {
$("banner").show();
}
});
});
console.log();
body {
background-color: azure;
}
.divi {
width: 500px;
height: 500px;
}
#divi1 {
background-color: red;
}
#divi2 {
background-color: greenyellow;
}
<!DOCTYPE html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" integrity="sha384-rwoIResjU2yc3z8GV/NPeZWAv56rSmLldC3R/AZzGRnGxQQKnKkoFVhFQhNUwEyJ" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.1.1.slim.min.js" integrity="sha384-A7FZj7v+d/sdmMqp/nOQwliLvUsJfDHW+k9Omg/a/EheAdgtzNs3hpfag6Ed950n" crossorigin="anonymous"></script>
<!-- Stylesheet for Mysite -->
<title>My Site</title>
</head>
<body>
<!-- Banner -->
<div id="banner" class="container-fluid">
<nav id="navscroll" class="navbar navbar-toggleable-sm navbar-light fixed-top">
<button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarNavAltMarkup" aria-controls="navbarNavAltMarkup" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<a class="navbar-brand" href="#">My Site</a>
<div class="collapse navbar-collapse" id="navbarNavAltMarkup">
<div class="navbar-nav">
<a class="nav-item nav-link active" href="#">Me<span class="sr-only">(current)</span></a>
<a class="nav-item nav-link" href="#">What I do</a>
<a class="nav-item nav-link" href="#">Find Me</a>
</div>
</div>
</nav>
</div>
<!-- Banner -->
<!-- Divs -->
<div class="container-fluid">
<div id="divi1" class="divi"></div>
<div id="divi2" class="divi"></div>
</div>
<!-- Divs -->
<!-- jQuery first, then Tether, then Bootstrap JS. -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js" integrity="sha384-DztdAPBWPRXSA/3eYEEUWrWCy7G5KFbe8fFjk5JAIxUYHKkDx6Qin1DkWx51bBrb" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/js/bootstrap.min.js" integrity="sha384-vBWWzlZJ8ea9aCX4pEW3rVHjgjt7zpkNpZk+02D9phzyeVkE+jo0ieGizqPLForn" crossorigin="anonymous"></script>
</body>
</html>
$("banner").show();
中忘记了#
。 - Mosh Feu