JSFiddle - React, Tailwind, and code Playground

HTML

<div class="tab selected">Hello world!</div>
<div class="tab">Good bye world!</div>

CSS

.tab {
    display: inline-block;
}
@media screen and (min-width: 600px) {
    .tab {
        display: none;
    }
    .selected {
        display:inline-block;
    }
}