O’Reilly Velocity Conference – Santa Clara Giveaway!
O'Reilly Velocity Conference in Santa Clara is right around the bend: June 20-23, 2016. Velocity is boasting an awesome lineup of speakers covering several different topics. Learn to build websites, apps, and services that are fast, scalable, resilient, and highly available!

Velocity is my favorite of the O'Reilly Conference series because speed optimization is fun, creative, and has huge payoff for users on desktop and mobile devices!
Bronze Pass Giveaway
My friends at O'Reilly are letting me give away one free Bronze Pass to Velocity Santa Clara. Want to win? In the comment section below, share your favorite performance tip. Bonus points for code samples!
20% Off Discount
If you want to sign up today, you click here and use code PC20DWALSH!
![5 Ways that CSS and JavaScript Interact That You May Not Know About]()
CSS and JavaScript: the lines seemingly get blurred by each browser release. They have always done a very different job but in the end they are both front-end technologies so they need do need to work closely. We have our .js files and our .css, but...
![Detect DOM Node Insertions with JavaScript and CSS Animations]()
I work with an awesome cast of developers at Mozilla, and one of them in Daniel Buchner. Daniel's shared with me an awesome strategy for detecting when nodes have been injected into a parent node without using the deprecated DOM Events API.
![Create a CSS Flipping Animation]()
CSS animations are a lot of fun; the beauty of them is that through many simple properties, you can create anything from an elegant fade in to a WTF-Pixar-would-be-proud effect. One CSS effect somewhere in between is the CSS flip effect, whereby there's...
![Duplicate the jQuery Homepage Tooltips Using Dojo]()
The jQuery homepage has a pretty suave tooltip-like effect as seen below:
Here's how to accomplish this same effect using Dojo.
The XHTML
The above HTML was taken directly from the jQuery homepage -- no changes.
The CSS
The above CSS has been slightly modified to match the CSS rules already...
Send Link preload headers for your CSS, JS, Fonts, and other assets so that the browser can get a head start on loading them. Bonus: If you use CloudFlare, or another CDN that supports it, the assets will be pushed via HTTP2 Server Push.
Sample .htaccess code from my blog: https://gist.github.com/adamzr/0c4e14999263aa4854b91f9245e16de8