JSFiddle - React, Tailwind, and code Playground

by Alexander Startsev

HTML

<ul class="buttons">
    <li><button>First</button></li>
    <li><button>Second</button></li>
    <li><button>Third</button></li>
    <li><button>Fourth</button></li>
</ul>
<div class="layers">
    <div class="active">One</div>
    <div>Two</div>
    <div>Three</div>
    <div>Four</div>
</div>

CSS

*{
    margin: 0;
    padding: 0;
}

body{
    margin: 10px;
}

.buttons{
    margin-bottom: 10px;
}

.buttons li{
    list-style: none;
    display: inline;
    margin-right: 10px;
}

    .buttons button{
        padding: 5px;
    }

.layers div{
    display: none;
    background: #00F;
    color: #FFF;
    padding: 10px;
    font: 14px/20px normal Arial, sans-serif;
}

.layers .active{
    display: block;
}

JavaScript

$(function(){
    $(".buttons button").on("click", function(){
        var layerIndex = $(this).parents("li").index();
        if(!($(".layers div:eq("+layerIndex+")").hasClass("active"))){
            $(".layers .active").slideToggle(100, function(){
                $(this).removeClass("active");
                $(".layers div:eq("+layerIndex+")")
                .slideToggle(100)
                .addClass("active");
            });    
        }
    });
})