JSFiddle - React, Tailwind, and code Playground
HTML
<canvas id="c" width="600" height="600"></canvas>
CSS
canvas {
border: 1px solid #ccc;
}
JavaScript
var canvas = new fabric.Canvas('c');
canvas.add(new fabric.Rect({
left: 100,
top: 100,
width: 50,
height: 50,
fill: '#faa',
originX: 'left',
originY: 'top',
centeredRotation: true
}));
canvas.add(new fabric.Circle({
left: 300,
top: 300,
radius: 50,
fill: '#9f9',
originX: 'left',
originY: 'top',
centeredRotation: true
}));
canvas.toJSON(c);