JSFiddle - React, Tailwind, and code Playground

HTML

<div class="card">
    <div class="card-front">
        A
    </div>
    <div class="card-back"></div>
</div>

CSS

.card {
    background: #fff;
    cursor: pointer;
    display: inline-block;
    font-size: 1.5em;
    font-weight: 800;
    line-height: 2em;
    border: 2px solid #000;
    height: 50px;
    margin: 5px 0 ;
    text-align: center;
    width: 38px;
    
    border-radius: 3px;
    -webkit-transform: perspective(1000px) rotateY(180deg) translateZ(-1px);
    -moz-transform: perspective(1000px) rotateY(180deg);
    transform: perspective(1000px) rotateY(180deg);
    -webkit-transform-style: preserve-3d;
    -moz-transform-style: preserve-3d;
    transition: all 0.2s linear;
}
.card.active {
    -webkit-transform: perspective(1000px) rotateY(0deg);
    -moz-transform: perspective(1000px) rotateY(0deg);
    transform: perspective(1000px) rotateY(0deg);
}
.card .card-front {
    display: block;
    width: 38px;
    height: 100%;
    -webkit-backface-visibility: hidden;
    -moz-backface-visibility: hidden;
}
.card .card-back {
    cursor: pointer;
    display: block;
    width: 38px;
    height: 100%;
    box-sizing: border-box;
    -webkit-backface-visibility: hidden;
    -moz-backface-visibility: hidden;
}

JavaScript

$("body").on("click", ".card", function () {
    $(this).toggleClass("active");
});