Edit fiddle - JSFiddle - React, Tailwind, and code Playground

JSFiddle - React, Tailwind, and code Playground

HTML

<div class="main">
    <div class="firstCol">
        asdfasdf
    </div>
    <div class="secondCol">
        asdfsadf<br/>
        asdfsadf<br/>
        asdfhiuhuihiuhiuhuihiuhiusadf<br/>
        asdfsadf<br/>
        asdfsadf<br/>
    </div>
</div>

CSS

.main {width:100%; height:auto; overflow:hidden;}
.firstCol {width:10%; height:auto; margin-bottom:-100%; padding-bottom:100%; background:#999; float:left;}
.secondCol {width:90%; height:auto; margin-bottom:-100%; padding-bottom:100%; background:#ccc; float:left;}

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JSFiddle - React, Tailwind, and code Playground

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CSS

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Use pre-released features

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Console