The transition of the box-shadow
makes fade in/out effect of the box shadow.
It is visible when you set a slow transition.
Is possible to remove this fade effect, that shadow appears only by x and y position?
If you want to remove the transition completely, you can delete this line:
transition:box-shadow 2s ease-out
Or if you want to keep the transition but have it fade-in in place, you need to set the shadow on the element then transition the colour:
a {
display: inline-block;
color: #FFF;
background-color: #333;
padding: 1rem;
transition: box-shadow 2s ease-out;
box-shadow: 1rem 1rem 0 0 transparent;
}
a:hover {
box-shadow: 1rem 1rem 0 0 #c00000;
}
<a href="#">
Test link
</a>