css+js实现左侧图标菜单点击伸缩效果代码-html代码-BFW代码库

css+js实现左侧图标菜单点击伸缩效果代码

代码语言：html

代码描述：css+js实现左侧图标菜单点击伸缩效果代码

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">
<link type="text/css" rel="stylesheet" href="//repo.bfw.wiki/bfwrepo/css/reset.min.css">
    <link rel='stylesheet' href='https://fonts.googleapis.com/icon?family=Material+Icons'>
<style>
    :root {
  --purple: #2E348A;
  --purple-light: #3E46B2;
  --purple-dark: #222768;
  --yellow: #F9C916;
  --white: #F6F6F4;
  --black: #272826;
}

.sidebar {
  padding-top: 1rem;
  padding-left: 2.1875rem;
  height: calc(100vh - 1rem);
  width: 100%;
  max-width: calc(250px - 2.1875rem);
  transition: 0.2s ease;
  background: var(--purple);
}
.sidebar h3 {
  margin-bottom: 1.25rem;
  font-weight: bold;
  text-transform: uppercase;
}
.sidebar h3:last-of-type {
  margin-top: 3.75rem;
}
.sidebar h3, .sidebar a {
  color: var(--white);
}
.sidebar li:not(:last-child) {
  margin-bottom: 7px;
}
.sidebar a {
  display: block;
  margin-left: -0.5rem;
  padding-left: 0.5rem;
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
  text-decoration: none;
  transition: 0.2s ease;
}
.sidebar a span {
  display: inline-block;
  vertical-align: middle;
}
.sidebar a:hover {
  background: var(--purple-light);
  border-radius: 2rem 0 0 2rem;
}
.sidebar .material-icons {
  margin-right: 1.25rem;
  font-size: 19px;
  vertical-align: middle;
}
.sidebar.collapsed {
  max-width: 60px;
  padding-left: 0;
  padding-right: 0;
  text-align: center;
}
.sidebar.collapsed a {
  margin-left: 0;
  padding-left: 0;
}
.sidebar.collapsed a span {
  max-height: 0;
  max-width: 0;
  opacity: 0;
  overflow: hidden;
}
.sidebar.collapsed a span::before {
  content: "";
  position: absolute;
  top: calc(50% - 6px);
  left: -20px;
  border: 1px solid;
  border-color: transparent var(--purple) transparent transparent;
  border-width: 6px 10px;
  opacity: 0;
  transition: 0.35s ease;
  transition-delay: 0.15s;
  transform: translateX(100%);
}
.sidebar.collapsed a:hover {
  border-radius: 0;
  position: relative;
}
.sidebar.collapsed a:hover span {
  position: absolute;
  height: 100%;
  top: 0;
  left: 100%;
  max-height: 60px;
  max-width: 250px;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
  display: flex;
  align-items: center;
  background: var(--purple);
  border-top-right-radius: 1rem;
  border-bottom-right-radius: 1rem;
  opacity: 1;
  overflow: initial;
  white-space: nowrap;
  transition: opacity 0.25s ease-in, max-width 0.3s ease-in;
}
.sidebar.collapsed a:hover span::before {
  opacity: 1;
  transfo.........完整代码请登录后点击上方下载按钮下载查看