JSFiddle - React, Tailwind, and code Playground

HTML

<body style="height: 100%; margin: 0px; padding: 0px;">
    <div style="background: blue; padding: 0px; height: 100%;
    display:-webkit-flex;display:-webkit-box;display:-moz-flex;display:-moz-box;display:-ms-flexbox;display:flex;
    -webkit-box-orient: vertical;-webkit-flex-direction: column;flex-direction:column;
    ">
        <div style="background: red; margin: 15px; height: 100px; ">hey jude</div>
        <div style="background: green; margin: 15px; overflow: auto;
		   -webkit-flex:1;-webkit-box-flex:1;-moz-flex:1;-moz-box-flex:1;-ms-flex:1;flex:1;
		   ">dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont let me down
            <br>dont...