Listing 21.15. Użycie elementu canvas do narysowania niebieskiego prostokąta
<body>

<canvas></canvas>

<script>
var canvas = document.getElementsByTagName('canvas')[0];

canvas.height = 200;
canvas.width = 400;

var context = canvas.getContext("2d");

context.fillStyle = 'blue';
context.fillRect(20, 20, 360, 160);

</script>

</body>