JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdn.jsdelivr.net/npm/[email protected]/distrib/jsxgraphcore.js"></script>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/distrib/jsxgraph.css">
    <div class="jsxwrap500px">
        <div id='jxgbox' class='jxgbox div1x1'></div>
    </div>

CSS

div.div1x1 {
            height: 0;
            padding-bottom: 100%;
        }

        div.jsxwrap500px {
            max-width: 500px;
            min-width: 100px;
            margin: 0 auto;
            overflow:hidden;
        }

JavaScript

const board = JXG.JSXGraph.initBoard('jxgbox', { 
    boundingbox: [-5, 5, 5, -5], axis:true
});
    var pol = board.create('polygon', [[-3,-3], [3,-3], [1,4]], {
            fillColor: 'yellow'
    });