Browsing CodePen, I stumbled upon a captivating CSS hover effect by Adam Argyle. The demo's app-like feel, particularly the background color smoothly transitioning from left to right and then exiting right to left, immediately caught my attention. I spent a good while recreating it, a process that highlighted the elegant use of transitions, transforms, and offsets.
My initial approach focused on background transitions, manipulating background-size
and background-position
. However, I couldn't achieve the desired bidirectional movement.
Next, I explored CSS transforms. While scaleX()
offered potential, applying it directly to the link element altered the content, an undesirable outcome. The solution? A pseudo-element!
Here's my implementation:
First, the base styles:
a { position: relative; } a::before { background: #ff9800; content: ""; inset: 0; position: absolute; transform: scaleX(0); transition: transform .5s ease-in-out; z-index: -1; }
This creates a pseudo-element (::before
) with an orange background, positioned absolutely within the link. transform: scaleX(0);
initially hides it, and transition
ensures a smooth animation.
The hover effect is then defined:
a:hover::before { transform: scaleX(1); transform-origin: right; }
On hover, scaleX(1)
expands the pseudo-element, and crucially, transform-origin: right;
sets the expansion point to the right. This is key to the mouse-out behavior.
The magic lies in the interaction of transition
and the change in transform-origin
. The transition smoothly animates the scaleX()
from 0 to 1 on hover and back again on mouse-out. The shift in transform-origin
from left
(default) to right
on hover reverses the animation direction for a seamless, bidirectional effect. Initially, I struggled with this, but the transform-origin
property proved to be the missing piece.
Thanks to Adam Argyle for the inspiration! This effect demonstrates the power of simple CSS techniques when used creatively.
The above is the detailed content of Adam Argyle's Sick Mouse-Out CSS Hover Effect. For more information, please follow other related articles on the PHP Chinese website!

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