Fabric.js Tutorial - Part 1

by asweigart

HTML

<!DOCTYPE html>
<html lang="en">
<head>
  <title>Fabric.js Rects and Circle</title>
  <meta charset="utf-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/5.3.1/fabric.min.js"></script>
</head>

<body>
  <!-- The HTML <canvas> element: -->
  <canvas id="mainCanvasId" width="400" height="400" style="border: 1px solid black;"></canvas>
</body>


<script>
// Create a Fabric.js "Canvas" object that is tied to the HTML <canvas> element:
let canvasObj = new fabric.Canvas('mainCanvasId');

// Create a Fabric.js "Rect" object that represents a rectangle:
let rectObj = new fabric.Rect({
  left: 100, top: 50, fill: 'red', stroke: 'blue', width: 80, height: 30
});

// The rectangle won't appear on the canvas until it is added:
canvasObj.add(rectObj);

// Create a second rectangle:
let rectObj2 = new fabric.Rect({
  left: 50, top: 100, fill: 'green', width: 50, height: 50
});

canvasObj.add(rectObj2);

// Create a circle:
let circleObj = new fabric.Circle({
  // Note that the radius is half the width of the circle.
  radius: 100, fill: '#FF00FF', left: 200, top: 200
});

canvasObj.add(circleObj);
</script>
</html>