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JavaScript Tutorials

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    JavaScript: Constructor Auto-Execution with new Keyword

    JavaScript is full of small, interesting facets that can trip you up, make you laugh, or make you cry.  This post is about an interesting one.  Those of you that have worked with JavaScript functions, and in a way JavaScript "classes" (as you used with MooTools)...

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    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...

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    Detecting Google Universal Analytics

    Just about everyone uses Google Analytics and why shouldn't they?  The amount of useful data you can pull from Google Analytics, especially if you use custom dimensions, is amazing.  Whether you're A/B testing, trying to increase engagement, or improve sales, Google Analytics is just about perfect. I recently experimented with...

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    Declarative Build Configurations

    Some time ago I posted an article how you can build apps faster using a build tool called Angus. In the meantime the tool has gotten a whole lot better, embracing the concept of declarative build configurations. In this article I would like to show...

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    iOS Mobile Safari Hover Menu Fix

    One component I'm quite proud of creating is the Mozilla Developer Network's dropdown menu component.  It's elegant, flexible, accessible via keyboard, and relatively compact (though it does require jQuery).  One problem I did notice, however, was that tapping once opened the menu (good) but you'd have...

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    Node.contains: Check if a Node is a Child of Another Node

    There are loads of basic, native JavaScript methods that many developers don't know about.  Many people don't know about the Element.classList API, for example, so className management becomes another case for needing a JavaScript toolkit for even the most basic tasks.  Another case is checking for node...

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    Unwrapping JSON-P

    This is a quickie simple post on JavaScript techniques. We're going to look at how to unwrap the "P" function-call padding from a JSON-P string to get the JSON from it. Note: Obviously, the recent push toward ubiquity of CORS is making JSON-P less important...

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    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...

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    Using String Replace in JavaScript

    This is a quickie simple post on JavaScript techniques. We're going to cover how to use the regular expression driven replace(..) with JavaScript string values. All string values have a replace(..) method available to them. This method allows you to pass a regular expression (or a string...

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    Force Stack Traces with JavaScript

    I recently inherited a Node.js project and man is that scary.  The code was well written but whenever you inherit a project you instantly inherit the fear of messing things up.  My goal was to fix a fairly routine bug, and finding the issue was fairly easy, but tracing...