JSFiddle - React, Tailwind, and code Playground

HTML

<div class="div2">
    Div2
</div>
<div class="div1">
    Div 1
</div>

CSS

/* Basic Styling */
body {
    background: #f4f4f4;
}
div {
    width: 300px;
    border: 1px solid #ddd;
    background: #fff;
    padding: 25px;
    border-radius: 5px;
}

/* What you need */
.div2 {
    float: right;
}
.div1 {
    float: left;
}

@media (max-width: 600px) {
    .div2,.div1 {
        float: none;
}