Why Does `overflow:hidden` Break `position:sticky`?

Why overflow:hidden Prevents position:sticky from Working

position:sticky allows an element to remain fixed until it meets another positioned element (such as a header), at which point it becomes static relative to that element. However, applying overflow:hidden to a container containing a sticky element can disrupt this behavior.

In traditional CSS, when an element's content overflows its parent container, the container's height will increase to accommodate the content. This expansion can affect the position of other elements within the container, including sticky elements.

When overflow:hidden is applied to a container, the container's height remains unchanged. This means that if the content of a sticky element overflows its container, the sticky element will not be able to move with the container. It will remain at its original position, giving the illusion that position:sticky is not working.

To address this issue, it is recommended to use contain: paint instead of overflow:hidden when hiding overflowing content. contain: paint prevents the overflow from affecting the layout of other elements within the container, including sticky elements.

The above is the detailed content of Why Does `overflow:hidden` Break `position:sticky`?. For more information, please follow other related articles on the PHP Chinese website!