JSFiddle - React, Tailwind, and code Playground

HTML

<svg xmlns="http://www.w3.org/2000/svg" version="1.1">
    <rect width="100" height="100" style="stroke-width:1;stroke:rgb(0,0,0)"
    />
</svg>

CSS

rect {
    fill:rgb(0, 0, 255);
    /*doesnt work height:100;*/
}