JSFiddle - React, Tailwind, and code Playground

HTML

<body>
    <div id="container">
        <div id="center"> <h1>center</h1> </div>
        <div id="right"> <h1>right</h1> </div>
    </div>
</body>

CSS

h1 {
}
#center {
    background-color: green;
    display: inline-block;
    float: left;
    width: 80%;
}
#right {
    background-color: red;
    float: left;
    width: 20%;
}

#container {
}