Animated Multiline Underline

animated-multiline-underline.css

.animated-multiline-underline {
    display: inline;
    text-decoration: none;
    width: calc(100%); /* somehow ie edge seems to need this */
    background-image: linear-gradient(transparent calc(100% - 1px), currentColor 100%);
    background-position: bottom left;
    background-repeat: no-repeat;
    background-size: 0% 1px;
    -webkit-transition: background-size 300ms linear;
    transition: background-size 300ms linear;
}

.animated-multiline-underline:hover {
    background-size: 100% 1px;
}