JSFiddle - React, Tailwind, and code Playground

HTML

<div id="toggle">Slide</div>
<div id="space"></div>
<div id="left">
</div>

<div id="right">
</div>

CSS

#toggle {
    position: absolute;
    top: 10px;
    left: 10px;
    background: #ccc;
    font-weight: bold;
    padding: 10px;
    cursor: pointer;
}

#left {
    width: 50px;
    height: 200px;
    background: #a0a;
    float: left;
}

#right {
    width: 300px;
    height: 200px;
    background: 300px;
    float: left;
}

#space {
    clear: both;
    display: block;
    height: 60px;
}

JavaScript

$('#toggle').click(function() {
    $('#left').toggle('slide');
});