Getting sticky with it — Troubleshooting CSS sticky positioning-CSS Tutorial-php.cn

Written by Ibadehin Mojeed✏️

You work for days, maybe months, to build a sleek web page. Everything looks great at first, but then you start scrolling… and suddenly, your sticky elements — navigation menus, headers, or the sidebar calls to action — either don’t stick at all or don’t stay where they’re supposed to.

Frustrating, right?

What might seem like a minor bug at first can quickly become a real headache, and if left unresolved, can significantly hurt your site’s engagement.

In this guide, we’ll tackle these most common sticky positioning problems:

No offset specified
Sticky element inside flex/grid containers
Height of the sticky element's container
Ancestor has an overflow property
overflow on the body element

Then we’ll walk through how to troubleshoot these sticky positioning problems with practical examples and tips to make you a sticky positioning professional! You can also find an overview of the position property and CSS sticky position after we’ve gone through the common issues.

No offset specified

The first and simplest troubleshooting step is to ensure that an offset is specified using properties such as top, right, bottom, or left:

.sticky-heading {
  position: sticky;
  top: 0; /* Offset not defined - sticky behavior won't activate */
}

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Without an offset, the sticky behavior won’t activate. Additionally, ensure that the applied offset is appropriate for the intended scroll direction. For example, top or bottom for vertical scrolling, and left or right for horizontal scrolling.

Sticky element inside flex/grid containers

The CodePen below demonstrates sticky elements inside grid containers:

See the Pen Sticky element inside grid containers by Ibaslogic (@ibaslogic) on CodePen.

In the CodePen, the headings stick because the container holding each of them has enough scrollable space. To better visualize the layout, try adding borders around the content. This will help you see how each heading stays in place as you scroll through the sections.

Getting sticky with it — Troubleshooting CSS sticky positioning

In the HTML code, the headings are placed within grid containers, and grid items naturally stretch to fill the available space. However, this stretching can prevent a sticky element from having enough room to scroll and stick.

To resolve this, we applied align-items: start to the grid container. This prevents the sticky element from being stretched, ensuring it has enough space to function as intended:

.sticky-heading {
  position: sticky;
  top: 0; /* Offset not defined - sticky behavior won't activate */
}

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Without align-items: start, the grid container would stretch the heading to fill the available space, preventing the element from sticking to the top of the viewport. This happens because there wouldn't be enough scrollable space for the element to properly attach as demonstrated below:

Getting sticky with it — Troubleshooting CSS sticky positioning

While the example shows the implementation for the grid, the same solution applies to flexbox layouts as well.

Height of the sticky element's container

As you interact with the CodePen below and scroll the viewport to observe the sticky behavior, you'll notice that the first sticky element doesn't work as expected, while the second one functions correctly — even though the layouts appear visually similar:

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;
  /* ... */
}

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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>
  
  
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</h2>

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<p><img src="https://img.php.cn/upload/article/000/000/000/173266096142897.jpg" alt="Getting sticky with it — Troubleshooting CSS sticky positioning"></p>

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