css实现左侧可折叠收缩边栏菜单效果代码-html代码-BFW代码库

css实现左侧可折叠收缩边栏菜单效果代码

代码语言：html

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&amp;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 {
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