Basic HTTP Request with Node.js
I'm currently working on adding client-side testing to the Mozilla Developer Network (MDN). I'm using Intern, a JavaScript-based WebDriver API created by my former employer SitePen. MDN has used its own Persona login service for years, and since many key features of MDN require login (and subsequent account creation), it was important that I have a way to get test credentials. There's a service
Get Real Image Height and Width Dimensions
One massive help provided by CSS in aiding developers to create responsive designs is max-width. I always set img, iframe, and embed tags to max-width: 100% so that they aren't allowed bleed through their parent and stretch the page on mobiles, but I recently asked myself if it was possible to get an image's "true" size with JavaScript. I wanted the real image dimensions without any CSS modifica
Responsive and Infinitely Scalable JS Animations
Back in late 2012 it was not easy to find open source projects using requestAnimationFrame() - this is the hook that allows Javascript code to synchronize with a web browser's native paint loop. Animations using this method can run at 60 fps and deliver fantastic game-like content interactions if one is careful to follow the rules.* Around this time, I had joined Art.com labs and it just so happen
CSS vs. JS Animation: Which is Faster?
How is it possible that JavaScript-based animation has secretly always been as fast — or faster — than CSS transitions? And, how is it possible that Adobe and Google consistently release media-rich mobile sites that rival the performance of native apps? This article serves as a point-by-point walkthrough of how JavaScript-based DOM animation libraries, such as Velocity.js and GSAP, are more perfor
Detecting CSS Animation Completion with JavaScript
One fact of web development life in 2014 that's been difficult for me to admit is that the traditional JavaScript toolkit is mostly dead. For years we relied on them for almost everything but now that JavaScript and CSS has caught up with what we need, we can often avoid using JavaScript toolkits if we take the time to research new native capabilities. One argument for sticking with toolkits tha
iPad Detection Using JavaScript or PHP
The hottest device out there right now seems to be the iPad. iPad this, iPad that, iPod your mom. I'm underwhelmed with the device but that doesn't mean I shouldn't try to account for such devices on the websites I create. In Apple's developer tip sheet they provide the iPad's user agent string: Mozilla/5.0 (iPad; U; CPU OS 3_2 like Mac OS X; en-us) AppleWebKit/531.21.10 (KHTML, like Gecko) Versio
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iOS Mobile Safari Link Double Tap Fix