JSFiddle - React, Tailwind, and code Playground

HTML

<div id="one" class="content"></div>
<div id="two" class="content"></div>
<button id="slide">Slide it</button>

CSS

.content {
    width: 100%;
    height: 50px;
}
#one {
    background-color: #000;
}
#two {
    background-color: #CFCFCF;
}

JavaScript

$('#slide').on('click', function() {
    $('#one').slideToggle();
})