关闭画布菜单html css

Question

我想像这样创建一个脱画布菜单，但是我将文本推出屏幕而不是裁剪。 我想添加一个在单击菜单后关闭菜单的功能。

我从画布菜单上的w3school获得了代码。

 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

与其尝试在click事件上添加/删除CSS规则，不如尝试使用添加/删除一个类的单个函数来实现打开/关闭。

我创建了一个开放类，它具有您在js中的样式-然后只是添加/删除该类以允许sidenav打开/关闭的一种情况。

这不是我建议的方式-但要使其与您的原始代码尽可能保持联系-我将整个内容包装在具有包装ID的div中，然后在单击该div时说（包含侧面导航栏和主面板），如果包装器具有开放类，则将其移除（关闭sidenav），否则，将其打开。

您将需要查看要触发打开的内容-我假设您不希望在整个疼痛面板上单击以打开侧面中殿-但这应为您提供一个如何在侧面导航之外进行点击的想法关闭它。

 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>