Introducing HTML5

Last year when I was working on the redesign of BonzoBox I used HTML5 for the first time. The specification is being developed by two groups, and consists of a bunch of different modules, each with a different level of readiness, and the actual specifications, (yes, both of them!), are meant more for people who build web browsers than people who build websites. This led to some confusion. While I eventually wrapped my head around HTML5 I never felt that I had as good a grasp of the language as I would have liked to, so when I heard about Introducing HTML5 I added it to my to-read list. I finally had a chance to read it a couple of weeks ago.

Introducing HTML5 is the overview that I was looking for when I first started learning about HTML5. While I wish I had found it then, (although it wasn’t published at that point), and I learned a lot from it now. One thing that I had completely missed in my self-directed HTML5 studies was the outlining module, (if you’ve missed it too it dictates how an outline of an HTML5 document would be created, which allows you to figure out how important each element is in relation to each other element on the page). I also learned about some new elements that I hadn’t yet stumbled across, (like <mark>), and learned more about HTML5 form elements than I already knew, (although I was fairly familiar with those from the 24ways article).

There’s a chapter about the <canvas> element in Introducing HTML5. I was scared of the canvas element but the canvas chapter changed me from afraid to excited. It’s not so hard as it looks to work with and there’s a lot of really cool stuff that can be done with it. It’ll be fun to play with when I get a chance.

There’s also a chapter about using HTML5 apps offline. It’s possible to tell the browser to cache most, even all, of a website or webapp so that it’s completely usable offline. This cache seems to be a lot stickier than the normal browser cache and I wonder if it would be possible to also use it to drastically speed up online apps. This could lead to some real pain when updating websites, but if it’s planned well enough it might work really well.

Finally, websockets look great. They look fast, to the point that maybe we could make some stuff lightning fast on the web. Unfortunately a security problem was discovered in the websockets protocol so it was disabled in Firefox 4 and the latest Opera, and apparently Google Chrome is set to disable it if any attacks are carried out. I really hope that the security issues will be ironed out quickly so there can be wide adoption of websockets. I’m having problems finding out what the current status is of the security issue, I can’t find any articles more recent than those from December, so if anyone knows what’s going on please post a link.

I learned a lot from Introducing HTML5, and I’m excited to redesign a website, (or a few), using it, plus some CSS3, (I’ll be reading up on that soon).

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