JSFiddle - React, Tailwind, and code Playground

HTML

<div id="uniqueItem">This is a unique Item</div>

<div class="oneClass">This is one class</div>

<div class="oneClass twoClass threeClass">This is one class</div>

CSS

div{
    margin-bottom:40px;
}
#uniqueItem{
    color:red;
    border:1px solid green;
}

.oneClass{
    background-color:blue;
    color:white;
}

.twoClass{
    padding:10px;
}

.threeclass{
    text-decoration:underline;
}

.oneClass.twoClass.threeClass{
    height:40px;
}