关闭导航栏时，sidenav 上的项目名称也会折叠

Question

我正在创建一个可以打开和关闭的侧边导航。问题是导航项的标题在关闭时也会折叠，我想解决这个问题。

像这样

css

.sideNav {
    height: 100%;
    width: 0;
    position: fixed;
    z-index: 999;
    top: 0;
    left: 0;
    background-color: #263238;
    overflow-x: hidden;
    transition: all 0.3s;
    padding-top: 60px;
}

.sideNav a {
    padding: 8px 8px 8px 32px;
    text-decoration: none;
    font-size: 25px;
    color: #fff;
    display: block;
    transition: 0.1s;
}

html

<ul id="sideNav" class="sideNav nav flex-column" style="width: 250px;"><li class="nav-item"><a href="#" class="nav-link>Title here</a></li></ul>

我在打开和关闭时改变了导航的宽度。

js

document.getElementById("sideNav").style.width = "250px"

document.getElementById('sideNav').style.width = "0"

Answer 1

诀窍是使用负 margin 等于导航栏宽度。关闭时保证金为负，打开时保证金为零。例如：

.sideNav {
   margin-left: -250px;
}

开业时

document.getElementById("sideNav").style.marginLeft = "0";

关闭时

document.getElementById("sideNav").style.marginLeft = "-250px";

关闭导航栏时，sidenav 上的项目名称也会折叠

Item name on side nav is also collapesed when closing nav bar

html

css

nav

bootstrap-4