JSFiddle - React, Tailwind, and code Playground

by CSS_Apprentice

HTML

<div class="container">
    <div class="square yellow"></div>
    <div class="square red"></div>
    <div class="square blue"></div>
    
    <div class="square yellow"></div>
    <div class="square red"></div>
    <div class="square blue"></div>
    
    <div class="square yellow"></div>
    <div class="square red"></div>
    <div class="square blue"></div>
</div>

CSS

.container {
    width: 250px;
    display: block;
    margin: 0 auto;
}

/* jQuery related */
.hidden{
     opacity:0;
}
.visible{
     opacity:1;
}

/* Animate */

.animated {
  -webkit-animation-duration: 1.25s;
          animation-duration: 1.25s;
  -webkit-animation-fill-mode: both;
          animation-fill-mode: both;
}

@-webkit-keyframes fadeIn {
  0% {opacity: 0;}
  100% {opacity: 1;}
}

@keyframes fadeIn {
  0% {opacity: 0;}
  100% {opacity: 1;}
}

.fadeIn {
  -webkit-animation-name: fadeIn;
          animation-name: fadeIn;
}



/* Boxes */
.square {
    height: 100px;
    width: 100px;
    margin: 5% auto;
    display: block;
}

.yellow {
    background-color: yellow;
}
.red {
    background-color: red;
}
.blue {
    background-color: blue;
}

JavaScript

jQuery(document).ready(function() {
    jQuery('.square').addClass("hidden").viewportChecker({
        classToAdd: 'visible animated fadeIn',
        offset: 100
       });
});