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<!DOCTYPE HTML>
<html>
<head>
<style>
body
{
margin: 0px;
padding: 0px;
}
#myCanvas
{
border: 1px solid #9C9898;
}
</style>
<script>
window.onload = function ()
{
var canvas = document.getElementById("myCanvas");
var context = canvas.getContext("2d");
var x = canvas.width / 2;
var y = canvas.height / 2 - 10;
var text = "I am canvas!";
context.font = "30pt Calibri";
context.textAlign = "center";
context.fillStyle = "red";
context.fillText(text, x, y);
// get text metrics
var metrics = context.measureText(text);
var width = metrics.width;
context.font = "20pt Calibri";
context.textAlign = "center";
context.fillStyle = "#555";
context.fillText("(" + width + "px wide)", x, y + 40);
};
</script>
</head>
<body>
<canvas id="myCanvas" width="400" height="170"></canvas>
</body>
</html>
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