JSFiddle - React, Tailwind, and code Playground

HTML

<div class='container'>
    <div class='row'>
        <div class='btn'>Hello</div>
    </div>
    <div class='clear'></div>
</div>
<div class='container'>
    <div class='row'>
        <div class='btn'>Hello</div>
        <div class='btn'>World</div>
    </div>
    <div class='clear'></div>
</div>
<div class='container'>
    <div class='row'>
        <div class='btn'>Hello</div>
        <div class='btn'>World</div>
        <div class='btn'>Foo</div>
    </div>
    <div class='clear'></div>
</div>

CSS

.container {
    width: 500px;
    border: 1px solid red;
    padding: 4px;
    margin: 4px;
}
.row {
    text-align: center;
}
.btn {
    display: inline-block;
    margin-right: 6px;
    background-color: #EEE;
}
.clear {
    clear: both;
}