css+js实现支持暗黑主题切换的自适应头部导航菜单效果代码-html代码-BFW代码库

代码语言：html

代码描述：css+js实现支持暗黑主题切换的自适应头部导航菜单效果代码，支持多级显示、支持图片菜单项。

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/boxicons.min.css">

<style>
    :root {
  --white-100: hsl(206, 5%, 100%);
  --white-200: hsl(206, 5%, 90%);
  --white-300: hsl(206, 5%, 80%);
  --white-400: hsl(206, 5%, 65%);
  --white-500: hsl(206, 5%, 45%);
  --black-100: hsl(210, 21%, 12%);
  --black-200: hsl(210, 21%, 9%);
  --black-300: hsl(210, 21%, 6%);
  --black-400: hsl(210, 21%, 3%);
  --black-500: hsl(210, 21%, 1%);
  --night-100: hsl(217, 27%, 20%);
  --night-200: hsl(217, 27%, 16%);
  --night-300: hsl(217, 27%, 12%);
  --night-400: hsl(215, 27%, 8%);
  --night-500: hsl(215, 27%, 4%);
  --pink-100: hsl(326, 85%, 90%);
  --pink-200: hsl(327, 87%, 80%);
  --pink-300: hsl(329, 86%, 70%);
  --pink-400: hsl(330, 81%, 60%);
  --pink-500: hsl(333, 71%, 50%);
  --shadow-small: 0 1px 3px 0 rgba(0, 0, 0, 0.1),
     0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-medium: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
     0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-large: 0 10px 15px -3px rgba(0, 0, 0, 0.1),
     0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

*,
*::before,
*::after {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  list-style: none;
  list-style-type: none;
  text-decoration: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

html {
  font-size: 100%;
  box-sizing: inherit;
  scroll-behavior: smooth;
  height: -webkit-fill-available;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  font-size: clamp(1rem, calc(0.97rem + 0.14vw), 1.09rem);
  font-weight: normal;
  line-height: 1.5;
  color: var(--black-300);
  background-color: var(--white-100);
}
body.darkmode {
  color: var(--white-100);
  background-color: var(--night-400);
}

main {
  overflow: hidden;
}

a,
button {
  cursor: pointer;
  user-select: none;
  border: none;
  outline: none;
  background: none;
}

img,
video {
  display: block;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

img {
  image-rendering: -webkit-optimize-contrast;
  image-rendering: -moz-crisp-edges;
  image-rendering: crisp-edges;
}

@keyframes slideLeft {
  0% {
    opacity: 0;
    transform: translateX(100%);
  }
  100% {
    opacity: 1;
    transform: translateX(0%);
  }
}
@keyframes slideRight {
  0% {
    opacity: 1;
    transform: translateX(0%);
  }
  100% {
    opacity: 0;
    transform: translateX(100%);
  }
}
.section {
  margin: 0 auto;
  padding: 6rem 0 2rem;
}

.container {
  max-width: 75rem;
  height: auto;
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.centered {
  text-align: center;
  vertical-align: middle;
  margin-bottom: 1rem;
}

.btn {
  display: inline-block;
  font-family: inherit;
  font-size: inherit;
  font-weight: 500;
  line-height: 1.5;
  text-align: center;
  vertical-align: middle;
  white-space: nowrap;
  user-select: none;
  border-radius: 0.25rem;
  text-transform: capitalize;
  transition: all 0.3s ease;
}
.btn-primary {
  padding: 0.75rem 1.5rem;
  color: var(--white-100);
  background-color: var(--pink-500);
  box-shadow: var(--shadow-medium);
}
.btn-darken {
  padding: 0.75rem 1.5rem;
  color: var(--white-100);
  background-color: var(--night-300);
  box-shadow: var(--shadow-medium);
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: auto;
  z-index: 100;
  margin: 0 auto;
  background-color: var(--white-100);
  box-shadow: var(--shadow-medium);
}
.darkmode .header {
  background-color: var(--night-300);
}

.brand {
  font-family: inherit;
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--pink-500);
  text-transform: uppercase;
  order: 1;
}
.darkmode .brand {
  color: var(--pink-300);
}

.navbar {
  display: flex;
  flex-wrap: wrap;
  align-content: center;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  height: 4rem;
  margin: 0 auto;
}
.navbar-left {
  display: flex;
  align-items: center;
  flex: 0 0 17%;
}
.navbar-center {
  display: flex;
}
.navbar-right {
  display: flex;
  flex: 0 0 17%;
  align-items: cente.........完整代码请登录后点击上方下载按钮下载查看