Adding red rectangle to canvas
<!DOCTYPE html> <html> <head> </head> <body> <canvas id="canvas" width="300" height="300"></canvas> <script src="lib/fabric.js"></script> <script> var canvas = new fabric.Canvas('canvas'); var rect = new fabric.Rect({ top : 100, left : 100, width : 60, height : 70, fill : 'red' }); canvas.add(rect); </script> </body> </html>