Hover underline effect with Elementor CSS - css

Question

I have been hitting my head against a brickwall with this issue.
I have tried using this line of code to create an underline on hover effect with CSS using Elementor. I've tried it with a button widget and a Text Editor widget but can't seem to get it to work at all. What am I missing?
Any help would be really helpful.
Thanks
:
.underline {
display: inline;
position: relative;
overflow: hidden;
}
.underline:after {
content: "";
position: absolute;
z-index: -1;
left: 0;
right: 100%;
bottom: -5px;
background: #000;
height: 4px;
transition-property: left right;
transition-duration: 0.3s;
transition-timing-function: ease-out;
}
.underline:hover:after,
.underline:focus:after,
.underline:active:after {
right: 0;
}

Answer 1

Your code almost works - the problem is the transition-property. You have left right which is not legal CSS. And in fact you only want to transition the right property, the underline stays anchored at the left side.
.underline {
display: inline;
position: relative;
overflow: hidden;
}
.underline::after {
content: "";
position: absolute;
z-index: -1;
left: 0;
right: 100%;
bottom: -5px;
background: #000;
height: 4px;
transition-property: right;
transition-duration: 0.3s;
transition-timing-function: ease-out;
}
.underline:hover::after,
.underline:focus:after,
.underline:active:after {
right: 0;
}
<div class="underline">Hover over me</div>
It can be helpful to run your code through the relvant validator. In this case I used the W3C CSS validator which picked up the error.
Although you can transition (animate) the right property as you have done it is often more performant (in CPU/GPU usage sense) to use transforms such as scale or translate to shrink/grow or move things.