关闭帆布菜单HTML教程

Question

我要让这样的关帆布菜单，但我要推文在屏幕作物，而不是。我想补充一点，关闭菜单后我点击了它的功能。

我从w3school关闭帆布菜单中的代码。

function openNav() { 
 
    document.getElementById("mySidenav").style.width = "250px"; 
 
    document.getElementById("main").style.marginLeft = "250px"; 
 
} 
 

 
function closeNav() { 
 
    document.getElementById("mySidenav").style.width = "0"; 
 
    document.getElementById("main").style.marginLeft= "0"; 
 
}

body { 
 
    font-family: "Lato", sans-serif; 
 
} 
 

 
.sidenav { 
 
    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; 
 
} 
 

 
.sidenav a { 
 
    padding: 8px 8px 8px 32px; 
 
    text-decoration: none; 
 
    font-size: 25px; 
 
    color: #818181; 
 
    display: block; 
 
    transition: 0.3s; 
 
} 
 

 
.sidenav a:hover, .offcanvas a:focus{ 
 
    color: #f1f1f1; 
 
} 
 

 
.sidenav .closebtn { 
 
    position: absolute; 
 
    top: 0; 
 
    right: 25px; 
 
    font-size: 36px; 
 
    margin-left: 50px; 
 
} 
 

 
#main { 
 
    transition: margin-left .5s; 
 
    padding: 16px; 
 
} 
 

 
@media screen and (max-height: 450px) { 
 
    .sidenav {padding-top: 15px;} 
 
    .sidenav a {font-size: 18px;} 
 
}

<div id="mySidenav" class="sidenav"> 
 
    <a href="javascript:void(0)" class="closebtn" onclick="closeNav()">&times;</a> 
 
    <a href="#">About</a> 
 
    <a href="#">Services</a> 
 
    <a href="#">Clients</a> 
 
    <a href="#">Contact</a> 
 
</div> 
 

 
<div id="main"> 
 
    <h2>Sidenav Push Example</h2> 
 
    <p>Click on the element below to open the side navigation menu, and push this content to the right.</p> 
 
    <span style="font-size:30px;cursor:pointer" onclick="openNav()">&#9776; open</span> 
 
</div>

Answer 1

而不是试图添加/删除CSS规则上单击事件 - 尝试使用一个单一的功能，增加/删除一个类来实现开/关。

我创建一个开放的类，有你在JS们的造型 - 那么它只是添加/删除类，允许sidenav打开/关闭的情况。

这是不是我会建议有它 - 但保持它与你的原码触摸尽可能多的 - 我包裹在一个div整个事情与包装的ID - 然后说，在点击的该div（其中包含侧NAV和主面板），如果包装物具有开放类 - 然后将其删除（关闭sidenav），并且如果不是 - 打开它。

你需要看看你想要触发的开放 - 我假设你不想在整个疼痛面板上打开侧面中殿 - 但这应该给你一个关于如何获得点击的想法在sidenav之外关闭它。

function toggleNav() { 
 
    var wrapper = document.getElementById("wrapper"); 
 
    
 
    if(wrapper.classList.contains("open")){ 
 
    wrapper.classList.remove("open") 
 
    } else { 
 
    wrapper.classList.add("open"); 
 
    }; 
 
}

body { 
 
    font-family: "Lato", sans-serif; 
 
} 
 

 
.sidenav { 
 
    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; 
 
} 
 

 
.open #mySidenav { 
 
    width:250px; 
 
} 
 

 
.open #main { 
 
    margin-left:250px; 
 
} 
 

 

 
.sidenav a { 
 
    padding: 8px 8px 8px 32px; 
 
    text-decoration: none; 
 
    font-size: 25px; 
 
    color: #818181; 
 
    display: block; 
 
    transition: 0.3s; 
 
} 
 

 
.sidenav a:hover, .offcanvas a:focus{ 
 
    color: #f1f1f1; 
 
} 
 

 
.sidenav .closebtn { 
 
    position: absolute; 
 
    top: 0; 
 
    right: 25px; 
 
    font-size: 36px; 
 
    margin-left: 50px; 
 
} 
 

 
#main { 
 
    transition: margin-left .5s; 
 
    padding: 16px; 
 
} 
 

 
@media screen and (max-height: 450px) { 
 
    .sidenav {padding-top: 15px;} 
 
    .sidenav a {font-size: 18px;} 
 
}

<div id="wrapper" class="" onclick="toggleNav()"> 
 
<div id="mySidenav" class="sidenav"> 
 
    <a href="javascript:void(0)" class="closebtn">&times;</a> 
 
    <a href="#">About</a> 
 
    <a href="#">Services</a> 
 
    <a href="#">Clients</a> 
 
    <a href="#">Contact</a> 
 
</div> 
 

 
<div id="main"> 
 
    <h2>Sidenav Push Example</h2> 
 
    <p>Click on the element below to open the side navigation menu, and push this content to the right.</p> 
 
    <span style="font-size:30px;cursor:pointer">&#9776; open</span> 
 
</div> 
 
<div>