div+css实现粘性头部导航条效果代码-html代码-BFW代码库

div+css实现粘性头部导航条效果代码

代码语言：html

代码描述：div+css实现粘性头部导航条效果代码，向下滚动试试。

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">
  
  
<style>
:root {
  --color-primary: purple;
  accent-color: var(--color-primary);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  font-family: Inter, Roboto, "Helvetica Neue", "Arial Nova", "Nimbus Sans", Arial, sans-serif;
  height: 100vh;
  padding-top: var(--_header-h, 4rem);
}

img {
  display: block;
  max-width: 100%;
  -o-object-fit: cover;
     object-fit: cover;
}

h1 {
  -webkit-margin-after: 1rem;
          margin-block-end: 1rem;
  font-size: 3rem;
}

h2 {
  font-size: 2rem;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

.wrapper {
  display: grid;
  place-content: center;
  height: 100vh;
}

.header {
  padding: 2rem;
  position: fixed;
  inset: 0 0 auto 0;
  transition: color 0.3s;
  z-index: 10;
  color: #fff;
}
.header::before {
  content: "";
  position: absolute;
  inset: 0;
  background-color: #fff;
  transform: scaleY(0);
  transition: transform 0.3s;
  transform-origin: top center;
  will-change: transform;
}
.header.is-sticky {
  color: #000;
}
.header.is-sticky::before {
  transform: scaleY(1);
}
.header__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav ul {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.nav ul li a {
  color: inherit;
}

.content {
  padding-block: 2rem;
  width: min(100% - 2rem, 70ch);
  margin-inline: auto;
  line-height: 1.5;
}

.flow > * + * {
  -webkit-margin-before: 1em;
          margin-block-start: 1em;
}

.hero {
  position: relative;
  -webkit-margin-before: calc(var(--_header-h, 4rem) * -1);
          margin-block-start: calc(var(--_header-h, 4rem) * -1);
}
.hero::before {
  content: "";
  position: absolute;
  inset: .........完整代码请登录后点击上方下载按钮下载查看