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JavaScript Tutorials

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    Page Visibility API

    One event that's always been lacking within the document is a signal for when the user is looking at a given tab, or another tab. When does the user switch off our site to look at something else? When do they come back?

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    iPhone Scrollbars with iScroll

    Since we've had web browsers and JavaScript, we've been intent on replacing native browser functionalities, and for many reasons. Whether it be that the native look or functionality is ugly, doesn't work the same across browsers, or isn't as feature-rich as it should be, we've...

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    Detect Scrollbar Width with JavaScript

    I've recently been working on an advanced JavaScript-based grid solution and let me tell you: it's quite an undertaking. Making sure the grid is accessible, reactive, efficient, and cross-browser compatible is difficult, but even the minor workings of each of those are hard.

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    Face Detection with jQuery

    I've always been intrigued by recognition software because I cannot imagine the logic that goes into all of the algorithms. Whether it's voice, face, or other types of detection, people look and sound so different, pictures are shot differently, and from different angles, I...

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    DOM Manipulation with put-selector

    DOM node manipulation is a big part of the web today; just look at how popular the jQuery JavaScript framework has gotten. The ability to easily work with the DOM allows us to do a lot of work in a little bit of code.

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    File Uploads and C:\fakepath\

    I was recently working on a project that required providing an AJAX uploading widget to users. I decided to use Dojo's dojox.form.FileInput widget so the "Upload" button would look just like every other button within the web application. Everything worked great until I tested...

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    Adaptive Images

    The landscape of web continues to change as we get more and more devices that we need to support. One concern when creating websites that should accommodate all screen sizes is image size. The acceptable size for an image is not the same across...

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    JavaScript Coding with Class

    I've spent the last two weeks in London, eating fish'n'chips, drinking cup'o'tea, and being a hooligan at the Arsenal. Oh yeah, there was a MooTools hackathon too. The MooTools hackathon was hugely successful and I'll be providing more detail about what was...

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    JavaScript and CSS Spinners with spin.js

    I think it's safe to say the days of using images to provide the "small touches" are over.  We can now safely create gradients, drop shadows, rounded corners, and scaled, rotated, transformed animations.  It seems we've now moved on to replacing...

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    Custom AJAX Content Handling with the Dojo Toolkit

    If you were to ask me for the top five words that should describe any JavaScript framework, one of them would be flexible.  The Dojo Toolkit is ultra-flexible in just about every way, using customizable classes and dojo-namespaced objects to to allow for maximal flexibility.  One...