css实现左侧可折叠收缩边栏菜单效果代码
代码语言：html
所属分类：菜单导航
代码描述：css实现左侧可折叠收缩边栏菜单效果代码
下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开
<!DOCTYPE html>
<html lang="en" >
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover">
<link rel='stylesheet' href='https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;700&display=swap'>
<style>
* {
border: 0;
box-sizing: border-box;
margin: 0;
padding: 0;
}
:root {
--hue: 223;
--hue2: 13;
--bg: hsl(var(--hue),10%,90%);
--fg: hsl(var(--hue),10%,10%);
--primary: hsl(var(--hue),90%,55%);
--red: hsl(var(--hue2),90%,55%);
--trans-dur: 0.3s;
font-size: calc(16px + (20 - 16) * (100vw - 320px) / (1280 - 320));
}
body,
button,
input {
font: 1em/1.5 "DM Sans", sans-serif;
}
body {
background-color: var(--bg);
color: var(--fg);
height: 100vh;
transition:
background-color var(--trans-dur),
color var(--trans-dur);
}
button {
-webkit-appearance: none;
appearance: none;
}
.nav {
background-color: hsl(0,0%,100%);
display: flex;
flex-direction: column;
position: relative;
height: 100%;
width: 16em;
transition:
background-color var(--trans-dur),
width var(--trans-dur) ease-in-out;
}
.nav__main {
overflow-x: hidden;
overflow-y: hidden;
padding: 2.5em 1.75em;
width: inherit;
-webkit-overflow-scrolling: touch;
scrollbar-width: 8px;
scrollbar-color: hsla(0,0%,0%,0.2) transparent;
}
.nav__main::-webkit-scrollbar {
width: 8px;
}
.nav__main::-webkit-scrollbar-track {
background: transparent;
}
.nav__main::-webkit-scrollbar-thumb {
background-color: hsla(0,0%,0%,0.2);
border-radius: 4px;
}
.nav__main:hover {
overflow-y: auto;
}
.nav__bottom {
background-color: inherit;
box-shadow: 0 1px 0 hsl(var(--hue),10%,80%) inset;
padding: 1em 1.75em;
transition: box-shadow var(--trans-dur);
}
.nav__heading {
color: hsl(var(--hue),10%,45%);
display: block;
font-size: 0.75em;
line-height: 1;
margin-bottom: 0.75rem;
text-transform: uppercase;
transition: color var(--trans-dur);
}
.nav__heading-text {
display: inline-block;
transform: translateX(0.75em);
transition: transform var(--trans-dur) ease-in-out;
}
.nav__items {
list-style: none;
margin: 0 0 3em 0;
}
.nav__items:last-child {
margin-bottom: 0;
}
.nav__item-box {
background-color: hsla(var(--hue),90%,55%,0);
border-radius: 0.75em;
color: hsl(var(--hue),20%,55%);
display: flex;
align-items: center;
padding: 0.75em;
text-align: left;
text-decoration: none;
transition:
background-color var(--trans-dur) ease-in-out,
color var(--trans-dur),
width var(--trans-dur) ease-in-out;
width: 12.5em;
min-width: 3em;
}
.nav__item-box:focus,
.nav__item-box:hover {
background-color: hsla(var(--hue),90%,55%,0.1);
color: var(--primary);
}
.nav__item-box:focus {
outline: transparent;
}
.nav__item-icon,
.nav__item-icon svg {
display: block;
width: 1.5em;
height: 1.5em;
}
.nav__item-icon {
flex-shrink: 0;
position: relative;
text-align: center;
transition: transform var(--trans-dur) ease-in-out;
}
.nav__item-icon--badge:before {
background-color: var(--primary);
border-radius: 50%;
box-shadow: 0 0 0 0.1em hsl(0,0%,100%);
content: "";
position: absolute;
top: 0;
right: 0;
width: 0.5em;
height: 0.5em;
transform: scale(0);
transition:
box-shadow var(--trans-dur),
transform var(--trans-dur) ease-in-out;
}
.nav__item-text {
margin-left: 0.75em;
display: inline-block;
overflow: hidden;
white-space: nowrap;
width: 100%;
transition:
opacity var(--trans-dur) ease-in-out,
width var(--trans-dur) ease-in-out;
}
.nav__item-badge {
background-color: hsla(var(--hue),90%,55%,0.1);
border-radius: 0.75rem;
color: var(--primary);
font-size: 0.75em;
line-height: 1;
margin-left: 0.75rem;
padding: 0.125rem 0.5rem;
transition:
background-color var(--trans-dur),
color var(--trans-dur);
}
.nav__item-box--red .nav__item-badge {
background-color: hsla(var(--hue2),90%,55%,0.1);
color: var(--red);
}
.nav__item-box--red .nav__item-icon--badge:before {
background-color: var(--red);
}
.nav__logo {
background-color: var(--primary);
border-radius: 0.75em;
color: hsl(0,0%,100%);
display: flex;
margin-bottom: 2.5em;
width: 3em;
height: 3em;
transform: translateX(0.75em);
transition:
background-color var(--trans-dur),
color var(--trans-dur),
transform var(--trans-dur) ease-in-out;
}
.nav__logo svg {
display: block;
margin: auto;
width: 2em;
height: 2em;
}
.nav[data-expanded="false"] {
width: 6.5em;
}
.nav[data-expanded="false"] .nav__heading-text {
transform: translateX(calc(2em - 50%));
}
.nav[data-expanded="false"] .nav__item-box {
width: 3em;
}
.nav[data-expanded="false"] .nav__item-icon--badge:before {
transform: scale(1);
}
.nav[data-expanded="false"] .nav__item-text {
opacity: 0;
width: 0;
}
.nav[data-expanded="false"] .nav__logo {
transform: translateX(0);
}
.nav[data-expanded="false"] [data-expand] .nav__item-icon {
transform: rotate(180deg);
}
/* Dark theme */
@media (prefers-color-scheme: dark) {
:root {
--bg: hsl(var(--hue),10%,20%);
--fg: hsl(var(--hue),10%,90%);
}
.nav {
background-color: hsl(var(--hue),10%,10%);
}
.nav__main {
scrollbar-color: hsla(0,0%,100%,0.2) transparent;
}
.nav__main::-webkit-scrollbar-thumb {
background-color: hsla(0,0%,100%,0.2);
}
.nav__bottom {
box-shadow: 0 1px 0 hsl(var(--hue),10%,30%) inset;
}
.nav__heading {
color: hsl(var(--hue),10%,65%);
}
.nav__item-box {
background-color: hsla(0,0%,100%,0);
color: hsl(var(--hue),20%,75%);
}
.nav__item-box:focus,
.nav__item-box:hover {
background-color: hsla(0,0%,100%,0.1);
color: hsl(0,0%,100%);
}
.nav__item-icon--badge:before {
box-shadow: 0 0 0 0.1em hsl(var(--hue),10%,10%);
}
.nav__item-badge {
background-color: hsl(var(--hue),90%,55%);
color: hsl(0,0%,100%);
}
.nav__item-box--red .nav__item-badge {
background-color: hsl(var(--hue2),90%,55%);
color: hsl(0,0%,100%);
}
.nav__logo {
background-color: hsl(0,0%,100%);
color: var(--primary);
}
}
</style>
</head>
<body>
<svg display="none">
<symbol id="app" viewBox="0 0 24 24">
<g fill="none" stroke="currentColor" stroke-linecap="round" stroke-width="2">
<path d="M9,11.969V5c0-1.657,1.343-3,3-3s3,1.343,3,3v1.003"/>
<path d="M15,12.002v6.998c0,1.657-1.343,3-3,3s-3-1.343-3-3v-1.015"/>
<path d="M12,15H4.992c-1.652,0-2.992-1.343-2.992-3s1.34-3,2.992-3h1.002"/>
<path d="M12,9h6.994c1.66,0,3.006,1.343,3.006,3s-1.346,3-3.006,3h-.961"/>
</g>
</symbol>
<symbol id="dashboard" viewBox="0 0 24 24".........完整代码请登录后点击上方下载按钮下载查看
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