我的问题是，当我将 div 类“mobile”的高度指定为 100wh 时，它只占据了大约一半的屏幕。另一件事是，我无法使移动 div 中的列表出现。我的目标是使用 flexbox 水平和垂直对齐它们，并在我按下汉堡包按钮时使它们出现，但到目前为止我根本看不到列表元素。感谢您的帮助!
* {
margin: 0;
padding: 0;
-webkit-tap-highlight-color: transparent;
}
.mobile {
position: fixed;
visibility: hidden;
background: rgba(255, 0, 0, 0);
width: 100vw;
height: 500px;
z-index: 1;
transition: visibility 1s, background 1s;
}
.hamburger {
align-items: center;
display: flex;
width: 25px;
height: 15px;
margin-right: 50px;
cursor: pointer;
display: none;
z-index: 2;
}
.hamburger.active .line {
background: rgba(0, 0, 0, 0);
transition: .2s;
}
.hamburger.active .line::before {
transform: rotate(45deg);
top: 0;
transition: .5s;
}
.hamburger.active .line::after {
transform: rotate(135deg);
top: 0;
transition: .5s;
}
.line {
position: relative;
background-color: black;
width: 100%;
height: 1px;
transition: .5s;
}
.line::before,
.line::after {
position: absolute;
content: "";
height: 1px;
width: 100%;
background-color: black;
}
.line::after {
top: 6px;
transition: .5s;
}
.line::before {
top: -6px;
transition: .5s;
}
.nav {
justify-content: flex-end;
display: flex;
flex-wrap: wrap;
letter-spacing: 1px;
padding: 30px 0;
margin-right: 50px;
}
.nav li {
text-align: center;
font-family: "Georgia";
padding-left: 60px;
font-size: .8em;
font-weight: normal;
letter-spacing: 1px;
list-style: none;
}
.nav li a {
position: relative;
text-decoration: none;
color: inherit;
transition: color .5s;
}
.nav li a::before {
top: 2em;
content: "";
position: absolute;
width: 100%;
height: 1px;
bottom: 0;
left: 0;
background-color: black;
-webkit-transform: scaleX(0);
transform: scaleX(0);
-webkit-transition: all 0.2s;
transition: all 0.2s;
}
.nav li a:hover::before {
-webkit-transform: scaleX(1);
transform: scaleX(1);
}
.nav, nav {
align-items: center;
display: flex;
}
nav .logo {
margin-left: 50px;
display: flex;
justify-content: flex-start;
flex: 1;
font-family: Georgia, serif;
font-size: .8em;
padding: 30px 0;
font-weight: bold;
letter-spacing: 3px;
}
.sublogo {
font-weight: lighter;
margin-left: 10px;
}
.sublogo::before {
content: '|';
margin-right: 10px;
}
@media (max-width: 1120px) {
.nav {
display: none;
}
.hamburger {
display: flex;
-ms-transform: scale(1.2, 1.2);
-webkit-transform: scale(1.2, 1.2);
transform: scale(1.2, 1.2);
}
nav .logo {
font-size: 1em;
letter-spacing: 3px;
transition: visibility .5s, opacity .5s;
}
nav .logo .sublogo {
letter-spacing: 3px;
}
.logo.active {
visibility: hidden;
opacity: 0;
transition: visibility .5s, opacity .5s;
}
.mobile.active {
display: flex;
visibility: visible;
background: rgba(255, 25, 55, 1);
transition: background 1s;
}
}
@media (max-width: 600px) {
nav .logo {
font-size: 1em;
letter-spacing: 3px;
}
.sublogo {
display: none;
}
}<!DOCTYPE html>
<html lang="en" dir="ltr">
<head>
<meta name="viewport" content="width=device-width" />
<link rel="stylesheet" type="text/css" href="//fonts.googleapis.com/css?family=Open+Sans" />
<link rel="stylesheet" href="stylesheet.css">
<script src="https://code.jquery.com/jquery-3.3.1.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$('.hamburger').click(function(){
$('.hamburger').toggleClass('active');
$('.logo').toggleClass('active');
$('.mobile').toggleClass('active');
})
})
</script>
<meta charset="utf-8">
<title>CSS & HTML NAVIGATION</title>
</head>
<body>
<nav>
<div class="logo">
navigation.
<div class="sublogo">
this is my first example
</div>
</div>
<ul class="nav">
<li><a href="#">html</a></li>
<li><a href="#">css</a></li>
<li><a href="#">javascript</a></li>
<li><a href="#">python</a></li>
<li><a href="#">c++</a></li>
<li><a href="#">php</a></li>
</ul>
<div class="hamburger">
<div class="line">
</div>
</div>
<div class="mobile">
<ul>
<li><a href="#">html</a></li>
<li><a href="#">css</a></li>
<li><a href="#">javascript</a></li>
<li><a href="#">python</a></li>
<li><a href="#">c++</a></li>
<li><a href="#">php</a></li>
</ul>
</div>
</nav>
</body>
</html>最佳答案
你做了width:100vw，你好像留下了height:500px； 无论如何，检查 .mobile div 的位置是固定的，但你没有指定任何约束，如 top:0;左:0； ETC;这就是该 div 在页面上太高的原因。
视口(viewport)没问题。 :D 祝你有美好的一天!
关于html - 视口(viewport)高度不起作用且列表未显示，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/53284252/