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Tutorials Page 138

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    QUOTA_EXCEEDED_ERR in Mobile Safari

    I've been working on an HTML5 application for the new Mozilla Marketplace, writing a tutorial along the way to help all of you create and promote your HTML5 web-powered app.  The HTML5 app uses localStorage to save basic search history, as well as other newer...

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    Asking for and Giving Help

    As you can probably imagine, I'm very used to giving help. Believe it or not, I ask for help quite a bit too. My years of development experience and asking for help have taught me quite a few lessons, lessons I'm dying to share...

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    Selector Engines: Right to Left

    One lessor known fact about CSS selectors, querySelectorAll, and JavaScript-based selector engines is that they read your selectors from right to left.  This news hit me as illogical at first, as you'd think that the first element in a selector string like "#myElement a.something .else" would...

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    JavaScript Canvas Image Conversion

    At last week's Mozilla WebDev Offsite, we all spent half of the last day hacking on our future Mozilla Marketplace app. One mobile app that recently got a lot of attention was Instagram, which sold to Facebook for the bat shit crazy price of one...

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    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.

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    Squash Commits with Git

    I'm not a git expert but I know enough git to get by, and surely know enough git to appreciate its ease of use over svn. A while ago I published some basic git commands to that go slightly beyond basic cloning and commits...

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    Thoughts on “Silent” Browser Upgrades

    With the release of version 12, Mozilla Firefox joins the Google Chrome ranks of silent browser updates.  This topic has gotten a lot of attention over the past few days due to Firefox's release and the fact that Mozilla the second vendor to implement said feature.

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    OS X Dock Dividers

    One thing I hate is Tottenham Football Club clutter.  I hate cluttered code, files littered on the desktop, and keeping files in my Downloads folder that I'll never need again.  One place I especially hate clutter is my OSX application dock.  I recently upgraded to OSX Lion...

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    DNS Prefetching

    Despite anchor tags having HREF attributes which lead to other host names, browsers do not execute DNS lookups on those domains. Content prefetching can be invaluable in speeding up your websites, but did you know that you can also implement DNS prefetching? It's as easy...

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    CSS Animations Between Media Queries

    CSS animations are right up there with sliced bread. CSS animations are efficient because they can be hardware accelerated, they require no JavaScript overhead, and they are composed of very little CSS code. Quite often we add CSS transforms to elements via CSS during...