我在bootstrap中使用下面的代码片段在导航栏中显示侧边栏。
我可以通过单击侧栏中的X按钮来关闭导航栏。如何通过点击页面上的任意位置以及仅使用javascript的关闭按钮来更改我的closeNav javascript以关闭侧边栏？
function openNav() {
document.getElementById("mySidenav").style.width = "230px";
document.getElementById("main").style.marginLeft = "250px";
}
/* Set the width of the side navigation to 0 and the left margin of the page content to 0 */
function closeNav() {
document.getElementById("mySidenav").style.width = "0";
document.getElementById("main").style.marginLeft = "0";
}
/* The side navigation menu */
.sidenav {
height: 100%; /* 100% Full-height */
width: 0; /* 0 width - change this with JavaScript */
position: fixed; /* Stay in place */
z-index: 1; /* Stay on top */
top: 0;
left: 0;
background-color: #111; /* Black*/
overflow-x: hidden; /* Disable horizontal scroll */
padding-top: 60px; /* Place content 60px from the top */
transition: 0.5s; /* 0.5 second transition effect to slide in the sidenav */
}
/* The navigation menu links */
.sidenav a {
padding: 8px 8px 8px 32px;
text-decoration: none;
font-size: 25px;
color: #818181;
display: block;
transition: 0.3s
}
/* When you mouse over the navigation links, change their color */
.sidenav a:hover, .offcanvas a:focus{
color: #f1f1f1;
}
/* Position and style the close button (top right corner) */
.sidenav .closebtn {
position: absolute;
top: 0;
right: 25px;
font-size: 36px;
margin-left: 50px;
}
/* Style page content - use this if you want to push the page content to the right when you open the side navigation */
#main {
transition: margin-left .5s;
padding: 20px;
}
/* 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) {
.sidenav {padding-top: 15px;}
.sidenav a {font-size: 18px;}
}<div id="mySidenav" class="sidenav">
<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>
<!-- Use any element to open the sidenav -->
<span onclick="openNav()">Siderbar Button click here</span>
<div id="main">
Body content is here</div>
答案 0 :(得分：4)
首先要做的事情。我建议你不要在HTML中使用onclick属性，这就是创建eventlisteners的原因
document.querySelector('span#open_menu').addEventListener('click',
function(){
openNav();
})
document.querySelector('. closebtn').addEventListener('click',
function(){
closeNav();
})
其次，只需以相同的方式向您的#main div添加另一个事件监听器，请记住，您可以使用不同的元素触发相同的事件而不会出现任何问题
document.querySelector('#main').addEventListener('click',
closeNav();
})
请记住在HTML中使用始终事件侦听器而不使用JS！
答案 1 :(得分：3)
只需向div添加一个事件监听器：
document.getElementById('main').addEventListener('click', closeNav);
function openNav() {
document.getElementById("mySidenav").style.width = "230px";
document.getElementById("main").style.marginLeft = "250px";
}
/* Set the width of the side navigation to 0 and the left margin of the page content to 0 */
function closeNav() {
document.getElementById("mySidenav").style.width = "0";
document.getElementById("main").style.marginLeft = "0";
}/* The side navigation menu */
.sidenav {
height: 100%;
/* 100% Full-height */
width: 0;
/* 0 width - change this with JavaScript */
position: fixed;
/* Stay in place */
z-index: 1;
/* Stay on top */
top: 0;
left: 0;
background-color: #111;
/* Black*/
overflow-x: hidden;
/* Disable horizontal scroll */
padding-top: 60px;
/* Place content 60px from the top */
transition: 0.5s;
/* 0.5 second transition effect to slide in the sidenav */
}
/* The navigation menu links */
.sidenav a {
padding: 8px 8px 8px 32px;
text-decoration: none;
font-size: 25px;
color: #818181;
display: block;
transition: 0.3s
}
/* When you mouse over the navigation links, change their color */
.sidenav a:hover,
.offcanvas a:focus {
color: #f1f1f1;
}
/* Position and style the close button (top right corner) */
.sidenav .closebtn {
position: absolute;
top: 0;
right: 25px;
font-size: 36px;
margin-left: 50px;
}
/* Style page content - use this if you want to push the page content to the right when you open the side navigation */
#main {
transition: margin-left .5s;
padding: 20px;
}
/* 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) {
.sidenav {
padding-top: 15px;
}
.sidenav a {
font-size: 18px;
}
}<div id="mySidenav" class="sidenav">
<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>
<!-- Use any element to open the sidenav -->
<span onclick="openNav()">Siderbar Button click here</span>
<div id="main" style="height:100vh;">
Body content is here
</div>
答案 2 :(得分：0)
只需将closeNav附加到正文并停止在openNav中传播事件。
function openNav(event) {
event.stopPropagation();
document.getElementById("mySidenav").style.width = "230px";
document.getElementById("main").style.marginLeft = "250px";
document.getElementsByTagName('body')[0].style.background = "grey";
}
/* Set the width of the side navigation to 0 and the left margin of the page content to 0 */
function closeNav() {
document.getElementById("mySidenav").style.width = "0";
document.getElementById("main").style.marginLeft = "0";
document.getElementsByTagName('body')[0].style.background = "white";
}/* The side navigation menu */
body {
height: 100vh;
width: 100%;
}
.sidenav {
height: 100%; /* 100% Full-height */
width: 0; /* 0 width - change this with JavaScript */
position: fixed; /* Stay in place */
z-index: 1; /* Stay on top */
top: 0;
left: 0;
background-color: #111; /* Black*/
overflow-x: hidden; /* Disable horizontal scroll */
padding-top: 60px; /* Place content 60px from the top */
transition: 0.5s; /* 0.5 second transition effect to slide in the sidenav */
}
/* The navigation menu links */
.sidenav a {
padding: 8px 8px 8px 32px;
text-decoration: none;
font-size: 25px;
color: #818181;
display: block;
transition: 0.3s
}
/* When you mouse over the navigation links, change their color */
.sidenav a:hover, .offcanvas a:focus{
color: #f1f1f1;
}
/* Position and style the close button (top right corner) */
.sidenav .closebtn {
position: absolute;
top: 0;
right: 25px;
font-size: 36px;
margin-left: 50px;
}
/* Style page content - use this if you want to push the page content to the right when you open the side navigation */
#main {
transition: margin-left .5s;
padding: 20px;
}
/* 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) {
.sidenav {padding-top: 15px;}
.sidenav a {font-size: 18px;}
}<body onclick="closeNav()">
<div id="mySidenav" class="sidenav" onclick="event.stopPropagation();">
<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>
<!-- Use any element to open the sidenav -->
<span onclick="openNav(event)">Siderbar Button click here</span>
<div id="main">Body content is here</div>
</body>
答案 3 :(得分：-1)
这是我的方法 - 基本上只是将另一个事件监听器添加到主区域，如果菜单打开则关闭它，否则不执行任何操作：
另外......在你的直播网站上，我会改变
var mainArea = document.querySelector("#main");
为：
var mainArea = document.querySelector("body");
获得最佳效果
var openButton = document.querySelector(".open-button");
var closeButton = document.querySelector(".closebtn");
var mainArea = document.querySelector("#main");
var menuIsOpen;
openButton.addEventListener("click", function() {
menuIsOpen = true;
document.getElementById("mySidenav").style.width = "230px";
document.getElementById("main").style.marginLeft = "250px";
});
closeButton.addEventListener("click", function(e) {
menuIsOpen = false;
document.getElementById("mySidenav").style.width = "0";
document.getElementById("main").style.marginLeft = "0";
});
mainArea.addEventListener("click", function(e) {
if (menuIsOpen == true) {
document.getElementById("mySidenav").style.width = "0";
document.getElementById("main").style.marginLeft = "0";
}
});/* The side navigation menu */
.sidenav {
height: 100%; /* 100% Full-height */
width: 0; /* 0 width - change this with JavaScript */
position: fixed; /* Stay in place */
z-index: 1; /* Stay on top */
top: 0;
left: 0;
background-color: #111; /* Black*/
overflow-x: hidden; /* Disable horizontal scroll */
padding-top: 60px; /* Place content 60px from the top */
transition: 0.5s; /* 0.5 second transition effect to slide in the sidenav */
}
/* The navigation menu links */
.sidenav a {
padding: 8px 8px 8px 32px;
text-decoration: none;
font-size: 25px;
color: #818181;
display: block;
transition: 0.3s
}
/* When you mouse over the navigation links, change their color */
.sidenav a:hover, .offcanvas a:focus{
color: #f1f1f1;
}
/* Position and style the close button (top right corner) */
.sidenav .closebtn {
position: absolute;
top: 0;
right: 25px;
font-size: 36px;
margin-left: 50px;
}
/* Style page content - use this if you want to push the page content to the right when you open the side navigation */
#main {
transition: margin-left .5s;
padding: 20px;
}
/* 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) {
.sidenav {padding-top: 15px;}
.sidenav a {font-size: 18px;}
}<div id="mySidenav" class="sidenav">
<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>
<!-- Use any element to open the sidenav -->
<span class="open-button">Siderbar Button click here</span>
<div id="main">
Body content is here</div>