JSFiddle - React, Tailwind, and code Playground

by Arnold Daniels

HTML

<button class="mybtn">Show</button>

<div class="foo">BAR</div>

----

CSS

.foo {
    opacity: 0;
    transition: all 400ms;
}
.foo.active {
    opacity: 1
}

JavaScript

$('.mybtn').click(function() { $('.foo').toggleClass('active'); })