JSFiddle - React, Tailwind, and code Playground

HTML

<div class="content">
    <a href="#">A</a>
</div>
<div class="content">
    <a href="#">B</a>
</div>
<div class="content">
    <a href="#">C</a>
</div>

CSS

.content {
    background-color:red;
    margin:10px;
}
.content.other {
    background-color:yellow;
}

JavaScript

$(".content a").click(function() {
    var current = $(this).parent();
    current.removeClass('other')
                .siblings()
                .addClass('other');
});