This is because the body creates the primary scrolling context for the entire page, and sticky elements still stick relative to the viewport in this case:<\/p>\n\n
As mentioned earlier, for the sticky element to function properly, its container must have enough height or scrollable space. Let’s take a closer look at the containers. In the first layout, the sticky element is enclosed within an extra
:
article {
align-items: start;
/* ... */
}
In the CodePen below, you can scroll the section to observe how the sticky headings now stick within the section itself. A border has been added to visualize the scrollable area:
overflow on the body element
Setting overflow on the body element typically doesn’t break sticky positioning as it might with other ancestor elements:
<body>
<p>This is because the body creates the primary scrolling context for the entire page, and sticky elements still stick relative to the viewport in this case:</p>
<p><iframe height="600" src="https://codepen.io/ibaslogic/embed/wvVzBJx?height=600&default-tab=result&embed-version=2" scrolling="no" frameborder="no" allowtransparency="true" loading="lazy">
</iframe>
</p>
<p>Even though a scrolling mechanism is created, it doesn't interfere with the sticky behavior as it would within smaller containers — except when setting overflow: hidden, which removes the ability to scroll any content that overflows the viewport. </p>
<p>Now that we’ve covered the common sticky issues, you can read a more general overview of the position property and sticky position.</p><h2>
A brief overview of the position property
</h2>
<p>The CSS position property controls how elements are positioned on a web page. With values like relative, absolute, fixed, or sticky, you can adjust an element’s placement using the top, right, bottom, and left properties within its containing block or the viewport. These values also enable elements to be positioned in relation to one another using z-index. </p>
<p>However, keep in mind that these offset properties (i.e., top, right, bottom, left) and z-index don’t apply to elements with the default static positioning. </p>
<p>When it comes to troubleshooting sticky positioning, it’s helpful to revisit what sticky value entails. Understanding its behavior will provide a clearer picture of common issues and how to address them effectively.</p>
<h2>
The CSS sticky position
</h2>
<p>When you apply position: sticky to an element, it behaves similarly to a relatively positioned element by maintaining its place in the document flow. However, it also gains the ability to become "sticky" and respond to scrolling. </p>
<p>If you define an offset, such as top: 10px, the element will stick to that position as you scroll down, behaving like it is using position: fixed. For horizontal scrolling, you can use offsets like left or right to achieve a similar effect. It's important to note that the sticky behavior only applies within the element’s containing block. Once you scroll past the boundaries of that block, the sticky element will scroll away like any normal element. </p>
<p>The CodePen below demonstrates the sticky behavior. Scroll the viewport to see the sticky headings in action:</p>
<p><iframe height="600" src="https://codepen.io/ibaslogic/embed/wvVKrrq?height=600&default-tab=result&embed-version=2" scrolling="no" frameborder="no" allowtransparency="true" loading="lazy">
</iframe>
</p>
<p>Each HTML heading is styled with position: sticky and top: 0, ensuring it sticks to the top of the viewport as you scroll through the content. However, the sticky headings remain confined to their respective sections. Once a section's content is fully scrolled past, its heading moves up, allowing the next heading to stick in place. This demonstrates that sticky elements do not escape their parent container.</p>
<h2>
Conclusion
</h2>
<p>Building a webpage can be frustrating when sticky elements don’t function as expected. However, understanding key factors like ancestor overflow properties and parent container heights can help you troubleshoot sticky positioning issues. </p>
<p>With the examples and tips in this guide, you’ll be able to ensure that sticky navigation, headers, and sidebar calls to action work smoothly. If you found this guide helpful, feel free to share it online. And if you have any questions or contributions, join me in the comments section!</p><hr>
<h2>
Is your frontend hogging your users' CPU?
</h2>
<p>As web frontends get increasingly complex, resource-greedy features demand more and more from the browser. If you’re interested in monitoring and tracking client-side CPU usage, memory usage, and more for all of your users in production, try LogRocket.</p>
<p><img src="/static/imghw/default1.png" data-src="https://img.php.cn/upload/article/000/000/000/173266096142897.jpg" class="lazy" alt="Getting sticky with it — Troubleshooting CSS sticky positioning"></p>
<p>LogRocket is like a DVR for web and mobile apps, recording everything that happens in your web app, mobile app, or website. Instead of guessing why problems happen, you can aggregate and report on key frontend performance metrics, replay user sessions along with application state, log network requests, and automatically surface all errors.</p>
<p>Modernize how you debug web and mobile apps — start monitoring for free.</p>
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