JSFiddle - React, Tailwind, and code Playground

HTML

<canvas id="c" width="400" height="400"></canvas>

CSS

#c {
    border:1px solid #ccc;
}

JavaScript

var canvas = new fabric.Canvas('c');

// create a circle object
var circle = new fabric.Circle({
  left: 150,
  top: 150,
  fill: 'green',
  radius: 100,
  id :"Kenteken"
});
canvas.add(circle);
canvas.renderAll();

canvas.forEachObject(function(obj){
  if(obj.id === "Kenteken"){
    console.log('aaaa')
  }else{
  	console.log('bbbb')
  }
});