尽管我很清楚自己想要实现什么目标，但我真的很难让它发挥作用。我想要实现的是我的网站的响应式布局，其中侧边栏菜单固定在台式机和笔记本电脑上，但随后切换到移动设备和平板电脑的汉堡菜单？<!DOCTYPE html><html><head><meta name="viewport" content="width=device-width, initial-scale=1"><style>body { font-family: "Lato", sans-serif;}.sidebar { height: 100%; width: 0; position: fixed; z-index: 1; top: 0; left: 0; background-color: #111; overflow-x: hidden; transition: 0.5s; padding-top: 60px;}.sidebar a { padding: 9px 8px 8px 32px; text-decoration: none; font-size: 25px; color: #818181; display: block; transition: 0.3s;}.sidebar a:hover { color: #f1f1f1;}.sidebar .closebtn { position: absolute; top: 0; right: 25px; font-size: 36px; margin-left: 50px;}.openbtn { font-size: 20px; cursor: pointer; background-color: #111; color: white; padding: 10px 15px; border: none;}.openbtn:hover { background-color: #444;}#main { transition: margin-left .5s; padding: 16px;}/* On smaller screens, where height is less than 450px, change the style of the sidenav (less padding and a smaller font size) */@media screen and (max-height: 450px) { .sidebar {padding-top: 15px;} .sidebar a {font-size: 18px;}}</style></head><body><div id="mySidebar" class="sidebar"> <a href="javascript:void(0)" class="closebtn" onclick="closeNav()">×</a> <a href="#">About</a> <a href="#">Services</a> <a href="#">Clients</a> <a href="#">Contact</a></div><div id="main"> <button class="openbtn" onclick="openNav()">☰ Open Sidebar</button> <h2>Collapsed Sidebar</h2> <p>Click on the hamburger menu/bar icon to open the sidebar, and push this content to the right.</p></div><script>function openNav() { document.getElementById("mySidebar").style.width = "250px"; document.getElementById("main").style.marginLeft = "250px";}function closeNav() { document.getElementById("mySidebar").style.width = "0"; document.getElementById("main").style.marginLeft= "0";}</script> </body></html>
1 回答
翻翻过去那场雪
TA贡献2065条经验 获得超13个赞
您只需要在通过 JS 切换菜单时设置要更改的值（width、等），然后将它们更改为您最初使用该菜单时使用的值。此外，您可能想要隐藏和显示切换按钮。margin-leftmedia query
这是一种方法：
body {
font-family: "Lato", sans-serif;
}
.sidebar {
height: 100%;
width: 250px;
position: fixed;
z-index: 1;
top: 0;
left: 0;
background-color: #111;
overflow-x: hidden;
transition: 0.5s;
padding-top: 60px;
}
.sidebar a {
padding: 9px 8px 8px 32px;
text-decoration: none;
font-size: 25px;
color: #818181;
display: block;
transition: 0.3s;
}
.sidebar a:hover {
color: #f1f1f1;
}
.sidebar .closebtn {
position: absolute;
top: 0;
right: 25px;
font-size: 36px;
margin-left: 50px;
display: none;
}
.openbtn {
font-size: 20px;
cursor: pointer;
background-color: #111;
color: white;
padding: 10px 15px;
border: none;
display: none;
}
.openbtn:hover {
background-color: #444;
}
#main {
transition: margin-left .5s;
padding: 16px;
margin-left: 250px;
}
/* On smaller screens, where height is less than 450px, change the style of the sidenav (less padding and a smaller font size) */
@media screen and (max-height: 450px) {
.sidebar {
padding-top: 15px;
width: 0;
}
.sidebar a {
font-size: 18px;
}
.openbtn {
display: block;
}
.sidebar .closebtn {
display: block;
}
#main {
margin-left: 0;
}
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<body>
<div id="mySidebar" class="sidebar">
<a href="javascript:void(0)" class="closebtn" onclick="closeNav()">×</a>
<a href="#">About</a>
<a href="#">Services</a>
<a href="#">Clients</a>
<a href="#">Contact</a>
</div>
<div id="main">
<button class="openbtn" onclick="openNav()">☰ Open Sidebar</button>
<h2>Collapsed Sidebar</h2>
<p>Click on the hamburger menu/bar icon to open the sidebar, and push this content to the right.</p>
</div>
<script>
function openNav() {
document.getElementById("mySidebar").style.width = "250px";
document.getElementById("main").style.marginLeft = "250px";
}
function closeNav() {
document.getElementById("mySidebar").style.width = "0";
document.getElementById("main").style.marginLeft = "0";
}
</script>
</body>
</html>
小提琴： https: //jsfiddle.net/1czk379m/2/
编辑：切换菜单后调整窗口大小时，样式之间似乎存在一些冲突。closeNav()更改了删除元素的内联样式的操作。也改为.sidebaron #mySidebarcss。
看看更新后的小提琴
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