HTML and CSS Reference
Now that we have gone through this exercise, we have to give you some bad news. While the code
we presented for CH6EX5.html works in most HTML5-compliant web browsers, the code stopped
working in some cases. With a bit of investigation, we discovered that Chrome and Internet Explorer
10 were not firing progress events. At the same time, Firefox removed the load event. While these
were anecdotal occurrences, they lead to one common truth: the HTML5 specification is not finished .
This is an obvious but important fact to note. If you are developing for HTML5 or Canvas, you are
developing with a moving target.