JSFiddle - React, Tailwind, and code Playground

HTML

<div class="sliding-u-l-r-l-inverse">
I want it to slide on the other direction.
</div>

CSS

.sliding-u-l-r-l-inverse {
    display: inline-block;
    position: relative;
    padding-bottom: 3px;
}
.sliding-u-l-r-l-inverse:before {
    content: '';
    display: block;
    position: absolute;
    left: 0;
    bottom: 0;
    height: 3px;
    width: 100%;
    transition: width 0s ease;
}
.sliding-u-l-r-l-inverse:after {
    content: '';
    display: block;
    position: absolute;
    right: 0;
    bottom: 0;
    height: 3px;
    width: 100%;
    background: blue;
    transition: width .8s ease;
    direction: rtl;
}
.sliding-u-l-r-l-inverse:hover:before {
    width: 0%;
    background: blue;
    transition: width .8s ease;
}
.sliding-u-l-r-l-inverse:hover:after {
    width: 0%;
    background: transparent;
    transition: width 0s ease;
}