JSFiddle - React, Tailwind, and code Playground

HTML

<div id="box">
    <p>Lorem ipsummy</p>
    <input type="checkbox" class="show-more"> Show more
    <div class="more">
        <p>Lorem</p>
    </div>
</div>

CSS

.more {
    display:none;
}

#box .show-more:checked + .more {
    display:block;
}