JSFiddle - React, Tailwind, and code Playground

HTML

<div class="btns">
                <a class="btn-s" href="#">Más demos</a>
                <a class="btn-e" href="#">Más demos</a>
            </div>

CSS

.btn-e {
    margin-left: 155px;
    background-color: rgba(83,155,232,0.9);   
}

.btn-s {
    margin-left: 120px;
    background-color: rgb(236, 130, 139);

}

.btn-s,
.btn-e {
    text-decoration: none;
    color: white;
    font-size: 90%;
    font-weight: 100;
    text-align: center;
    padding: 10px 20px;
    border-radius: 25px;
    transition:  0.15s;
    display: inline-block;
}

.btn-eScript {
      color: blue;
      transform: scale(1.5);
}

JavaScript

var btnE = document.querySelector(".btn-e");
btnE.addEventListener('mouseover', function() {
    btnE.classList.add("btn-eScript")
})
btnE.addEventListener("transitionend", function() {
    btnE.classList.remove("btn-eScript")
})