JSFiddle - React, Tailwind, and code Playground

HTML

<div class="first"><div class="second"><table>
        <tr><td class="headcol">1</td><td class="long">QWERTYUIOPASDFGHJKLZXCVBNM</td><td class="long">QWERTYUIOPASDFGHJKLZXCVBNM</td></tr>
        <tr><td class="headcol">2</td><td class="long">QWERTYUIOPASDFGHJKLZXCVBNM</td><td class="long">QWERTYUIOPASDFGHJKLZXCVBNM</td></tr>
        <tr><td class="headcol">3</td><td class="long">QWERTYUIOPASDFGHJKLZXCVBNM</td><td class="long">QWERTYUIOPASDFGHJKLZXCVBNM</td></tr>
        <tr><td class="headcol">4</td><td class="long">QWERTYUIOPASDFGHJKLZXCVBNM</td><td class="long">QWERTYUIOPASDFGHJKLZXCVBNM</td></tr>
        <tr><td class="headcol">5</td><td class="long">QWERTYUIOPASDFGHJKLZXCVBNM</td><td class="long">QWERTYUIOPASDFGHJKLZXCVBNM</td></tr>
        <tr><td class="headcol">6</td><td class="long">QWERTYUIOPASDFGHJKLZXCVBNM</td><td class="long">QWERTYUIOPASDFGHJKLZXCVBNM</td></tr>
        <tr><td class="headcol">7</td><td class="long">QWERTYUIOPASDFGHJKLZXCVBNM</td><td class="long">QWERTYUIOPASDFGHJKLZXCVBNM</td></tr>
        <tr><td class="headcol">8</td><td class="long">QWERTYUIOPASDFGHJKLZXCVBNM</td><td class="long">QWERTYUIOPASDFGHJKLZXCVBNM</td></tr>
        <tr><td class="headcol">9</td><td class="long">QWERTYUIOPASDFGHJKLZXCVBNM</td><td class="long">QWERTYUIOPASDFGHJKLZXCVBNM</td></tr>
    </table></div></div>

CSS

body { font:16px Calibri;}
        table { border-collapse:separate; border-top: 3px solid grey; }
        td {
            margin:0;
            border:3px solid grey; 
            border-top-width:0px; 
            white-space:nowrap;
        }
        div.second { 
            width: 600px; 
            overflow-x:scroll;  
            margin-left:5em; 
            overflow-y:visible;
            padding-bottom:1px;
            height: auto;
        }
        div.first {
            width: auto;
            overflow-y: scroll;
            overflow-x: hidden;
            height: 150px;           
            padding-bottom: 1px;
            position: absolute;
            left:0;
            top:auto;
        }
        .headcol {
            position: absolute; 
            width:5em; 
            left:0;
            top:auto;
            border-right: 0px none black; 
            border-top-width:3px; /*only relevant for first row*/
            margin-top:-3px; /*compensate for top border*/
        }
        .headcol:before {content: 'Row ';}
        .long { background:yellow; letter-spacing:1em; }