JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/1.6.2/fabric.min.js"></script>
<canvas id="fabric" width="500" height="500"></canvas>

JavaScript

var canvas = new fabric.Canvas('fabric');
canvas.backgroundColor = '#ffffff';
canvas.renderAll();
canvas.isDrawingMode = true;
canvas.freeDrawingBrush.width = 5;
canvas.freeDrawingBrush.color = 'rgba(255, 0, 0, 0.1)';