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JSFiddle - React, Tailwind, and code Playground

HTML

<div style="text-align: center; background-color: red;">
    <div style="border: solid 1px black; width: 100px; height: 100px; background-color: blue">Not working</div>
</div>

<div style="background-color: red;">
    <div style="border: solid 1px black; width: 100px; height: 100px; background-color: blue; margin-left: auto; margin-right: auto">Works</div>
</div>

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