要使用CSS和JavaScript在滚动条上创建固定/粘性标头，代码如下-
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1" />
<style>
body {
font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
margin: 0px;
padding: 0px;
height: 150vh; /*To produce scroll bar*/
}
.header {
width: 100%;
background-color: rgb(52, 21, 110);
color: white;
padding: 50px;
font-size: 20px;
}
div.sticky {
position: fixed;
top: 0;
}
</style>
</head>
<body>
<h1>Fixed Sticky on scroll example</h1>
<h2>Random Header Text</h2>
<h2>Randorm Header Text</h2>
<div class="header">Header Text</div>
<p style="font-size: 35px;">
Lorem ipsum dolor sit amet, consectetur adipisicing elit. Odit vel dolore delectus esse
consequatur at nulla, consequuntur sint quas ea. Incidunt, ex. Consequatur ipsa earum
veritatis fugiat iusto, doloremque sunt beatae quaerat laboriosam nemo soluta quidem porro
quia. Dolore reprehenderit cum voluptatibus eius assumenda ipsam tenetur asperiores magni
aliquid eligendi doloribus quidem ipsa et praesentium provident molestias quaerat laboriosam,
veniam aspernatur repellendus. Debitis sapiente, odit iste voluptatibus nesciunt veritatis
incidunt mollitia nostrum, vitae suscipit iusto molestias consequuntur rem facere perspiciatis
ad! Ratione reiciendis asperiores aperiam vitae facilis accusantium non aliquid, facere
cupiditate reprehenderit tempore veritatis eum accusamus omnis
tempora quos!
</p>
<script>
window.onscroll = function() {
setSticky();
};
var header = document.querySelector(".header");
var sticky = header.offsetTop;
function setSticky() {
if (window.pageYOffset > sticky) {
header.classList.add("sticky");
}
else {
header.classList.remove("sticky");
}
}
</script>
</body>
</html>