JSFiddle - React, Tailwind, and code Playground

HTML

<div class="element">a</div>

CSS

.element {
    width: 100px;
    background: red;
    font-weight:400;
    font-size:40px;
    line-height:100px;
    text-align:center;
    height: 100px;
    transition: all 2s linear;
    -webkit-transition: all 2s linear;
}
.element:hover {
    height: 200px;
    font-weight: 600;
    line-height: 200px
}