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Basically, it's simple with CSS, but easy to overlook the layout shift if you don't compensatesate for the removed header flow.<\/p>"}

Table of Contents

Use position: fixed for the header

Account for content jumping

Optional: Add smooth appearance effects

Full minimum example

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How to create a fixed header on scroll with CSS?

下次還敢

Aug 02, 2025 am 07:38 AM

Use the position: fixed attribute of CSS to create a fixed header. 1. Set position: fixed, top: 0, left: 0 and width: 100% for the header to fix it on the top of the window; 2. Set z-index: 1000 to ensure that the header is above other content; 3. Add padding-top to the main content area, the value is equal to the header height to prevent the content from suddenly moving up due to the header's escape from the document flow; 4. Optionally use box-shadow and box-sizing: border-box in the header to optimize vision and layout; finally, the header is always topped and the content scrolls normally.

How to create a fixed header on scroll with CSS?

To create a fixed header that stays at the top of the page when scrolling, you can use pure CSS with the position: fixed property. This is a common UI pattern that improves navigation on long web pages.

Use `position: fixed` for the header

The key is to apply position: fixed to your header element and set its width to span the full top of the viewport.

 header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: white;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  z-index: 1000; /* Ensures the header stays above other content */
}

This will "lock" the header at the top of the viewport, even as the user scrolls down the page.

Account for content jumping

When you use position: fixed , the header is removed from the normal document flow. This can cause the main content to jump up, as if the header suddenly disappeared.

To prevent this, add padding or margin to the top of the main content equal to the height of the header.

 main {
  padding-top: 80px; /* Adjust this value to match your header&#39;s height */
}

Alternatively, you can wrap your content in a container and apply the padding to that.

Optional: Add smooth appearance effects

You can enhance the fixed header with subtle transitions or hide it on scroll down and show on scroll up using JavaScript, but for a basic CSS-only version, the above is sufficient.

Full minimum example

 <!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <title>Fixed Header Example</title>
  <style>
    body {
      margin: 0;
      font-family: Arial, sans-serif;
    }

    header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 60px;
      background: #ffff;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
      z-index: 1000;
      display: flex;
      align-items: center;
      padding: 0 20px;
      box-sizing: border-box;
    }

    main {
      padding-top: 60px; /* Same as header height */
      min-height: 2000px; /* For scroll demo */
    }
  </style>
</head>
<body>
  <header>
    <h1>My Fixed Header</h1>
  </header>
  <main>
    <p>Scroll down to see the fixed header in action.</p>
    <!-- Add more content to enable scrolling -->
  </main>
</body>
</html>

That's it. The header stays in place, and the content scrolls underneath it. Just make sure to:

Set z-index so the header doesn't get covered by other elements.
Match the padding-top of the content to the header's height.
Use box-sizing: border-box if your header has padding or borders.

Basically, it's simple with CSS, but easy to overlook the layout shift if you don't compensatesate for the removed header flow.

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How to create a fixed header on scroll with CSS?

Use position: fixed for the header

Account for content jumping

Optional: Add smooth appearance effects

Full minimum example

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Hot Tools

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Hot Topics

Use `position: fixed` for the header