David Walsh Tutorials

• By David WalshJanuary 3, 2012

  JavaScript Battery API

  Mozilla Aurora 11 was recently released with a bevy of new features. One of those great new features is their initial implementation of the Battery Status API. This simple API provides you information about the battery's current charge level, its...

• By David WalshJanuary 2, 2012

  PHP Text Messaging with TextMagic

  A few months back I wrote a shocking expose about how sending text messages with PHP was as simple as a simple call to mail(). The only drawback to using the mail method is that you need know the carrier for a given phone...

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• By David WalshJanuary 1, 2012

  JavaScript CDN Fallbacks

  CDNs are great for pulling shared resources from, especially JavaScript libraries. The advantage in the likelihood that a file is already cached before the user gets to our site is huge. The only problem with using a CDN is that it's out of control;...

• By David WalshDecember 29, 2011

  CSS Circles

  A while back I shared a clever technique for creating triangles with only CSS. Over the past year, I've found CSS triangles incredibly effective, especially when looking to create tooltips or design elements with a likewise pointer pattern. There's another common shape...

• By David WalshDecember 26, 2011

  Interesting -moz CSS Properties

  I'm always on the lookout for interesting vendor-specific features and prefixes. The beauty in them is that they allow developers to enhance where possible; they aren't taken into account as core design, but provide nice little touches. I was poking around Mozilla's MDN...

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• By David WalshDecember 23, 2011

  CSS Filters

  CSS filter support recently landed within WebKit nightlies. CSS filters provide a method for modifying the rendering of a basic DOM element, image, or video. CSS filters allow for blurring, warping, and modifying the color intensity of elements. Let's have...

• By David WalshDecember 21, 2011

  December 2011 Mailbag

  I get loads of questions each day so I decided to take a few moments to answer your questions about JavaScript, Dojo, MooTools, jQuery, and more. How did you get so good at everything you do? How did you practice without feeling like you wasted time? I'm the...

• By David WalshDecember 16, 2011

  PHP Advent 2011: Cross-Origin Ajax with CORS

  I've had the honor of writing for this year's PHP Advent, blessing you all about Cross-Origin Requests with CORS: There's no doubt that Ajax is one of the most exciting, useful, and necessary web technologies available to front-end developers. Unfortunately, it's also one of the most restrictive — especially...

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• By David WalshDecember 15, 2011

  DOM Events in JavaScript

  Mozilla Firefox 7 introduced CSS' useful text-overflow: ellipsis, an outstanding method of dynamically and elegantly concatenating strings within their parent elements. Firefox was late to the text-overflow party, so the Dojo Toolkit offered dojox.ellipsis, a resource that would shim ellipsis functionality with an iFrame. When...

• By David WalshDecember 12, 2011

  #FreeDavidWalshDotName: Mission Accomplished

  As you must certainly know by now, my domain name was stolen. After weeks of pressuring domain registrars to give me the domain back, DAVIDWALSH.NAME is finally in my name again. It was a wild few weeks so this post will attempt to...