How to Prevent Element Jitter on Hover When Adding CSS Borders?

Preserving Element Alignment with CSS Borders on Hover

In web development, enhancing the user experience often involves adding visual feedback on hover states. However, adding a border to an element on hover can cause a minor visual shift due to the additional space it takes up. This article explores how to alleviate this issue without resorting to background images.

Consider the following code:

.jobs .item:hover {
    background: #e1e1e1;
    border-top: 1px solid #d0d0d0;
}

This code sets a background color for the item element on hover. It also adds a 1px solid border to the top of the element. However, the border adds an extra pixel of space, causing the element to "jump" on hover.

To address this, we can employ a technique known as "invisible borders." By making the border transparent, we preserve the element's positioning while still achieving the desired effect:

.jobs .item {
   background: #eee;
   border: 1px solid transparent;
}

.jobs .item:hover {
   background: #e1e1e1;
   border: 1px solid #d0d0d0;
}

In this code, we set the border of the item element to 1px solid transparent. This creates a border that exists without adding any visible space. When the element is hovered over, the border color is changed to #d0d0d0, becoming visible and maintaining the element's alignment.

By leveraging this technique, we can effectively add CSS borders on hover without altering the alignment of the element. This ensures a seamless and visually appealing user experience while maintaining code simplicity.

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