246996016-HTML5-Step-by-Step

Using the HTML5 Tag 309
If you become bored with a 4 by 4 grid, change the number of blocks by changing this
line in the code, as follows:
var numBlocks = 4;
The code in the example will dynamically change the grid to match the number of blocks
you specify by setting the numBlocks variable. Although this example uses several Java-
Script elements that are beyond the scope of this book, it is a good introduction to the
interactivity possible with even a basic canvas application.
The element will grow in popularity and usage over the next several years,
but it will be quite some time before all browsers will support it. For example, even
though Internet Explorer 9 will support the canvas element, the older versions of Internet
Explorer will linger for years to come. However, If you’d like to learn more about the
element, including seeing additional (and much more full-featured) examples
and a tutorial, visit https://developer.mozilla.org/en/HTML/Canvas.