JSFiddle - React, Tailwind, and code Playground

HTML

<div class="blueDiv toBeFaddedIn"></div>
<div class="blueDiv toBeFaddedIn"></div>
<div class="blueDiv toBeFaddedIn"></div>
<div class="blueDiv toBeFaddedIn"></div>
<div class="blueDiv toBeFaddedIn"></div>

CSS

.blueDiv {
    background-color: blue;
    height:50px;
    width: 50px;
    display: none;
    
}

JavaScript

function fadeSequence(elements){
        elements.first().fadeIn("fast", function() {
            fadeSequence(elements.slice(1));
        });
}
fadeSequence($(".toBeFaddedIn"));