HTML and CSS Reference
<div style="position: absolute; top: 50px; left: 50px;">
<canvas id="canvasOne" width="500" height="300">
Your browser does not support HTML5 Canvas.
Figure 1-3. HTML5 Canvas Hello World!
Debugging with Console.log
There is one more thing to discuss before we explore bigger and better things beyond
“Hello World!” In this topic, we have implemented a very simple debugging method-
ology using the console.log functionality of modern web browsers. This function lets
Firefox with Firebug installed) can make use of console.log . However, browsers with-
out console.log support throw a nasty error.
To handle this error, we use a wrapper around console.log that only makes the call if
the function is supported. The wrapper creates a class named Debugger , and then creates
a static function named Debugger.log that can be called from anywhere in your code,