Article about implementing authentication (current_user) and authorization (access rights) in AngularJS.

Has an surprising amount of practical and understandable code.

Crazy hack. Might be useful one day.

The code required has since been extracted into a library.

This works in all relevant browsers:

document.activeElement

You can use this in your Selenium steps, for example, to assert that a form field is or is not focused.

• Added information about what jQuery considers "visible"
• Added a solution for Prototype
• Added a patch for Prototype that replaces the useless Element#visible() method with an implementation that behaves like jQuery.

zClip is a lightweight jQuery "copy to clipboard" plugin built using the popular Zero Clipboard library. This plugin uses an invisible Adobe Flash movie that is fully compatible with Flash Player 10 and below.

KeyboardJS is a library for binding to keys or key combos

"Wallaby" is the codename for an experimental technology that converts the artwork and animation contained in Adobe® Flash® Professional (FLA) files into HTML. This allows you to reuse and extend the reach of your content to devices that do not support the Flash runtimes. 

The difference between .bind(), .live(), and .delegate() is not always apparent. Having a clear understanding of all the differences, though, will help us write more concise code and prevent bugs from popping up in our interactive applications.

jQuery's selector engine, live()-like event handlers, pixel-perfect layout measuring.

Thanks to habits engrained by Rails 2’s link_to_remote and remote_form_for, we expect that Rails 3 would also handle the AJAX response for our remote links and forms. But it doesn’t; it leaves that for you.

The timepicker addon adds a timepicker to jQuery UI Datepicker, thus the datepicker (jQueryUI) is required for using any of these. In addition all datepicker options are still available through the timepicker addon.

Captify is a plugin for jQuery written by Brian Reavis (@brianreavis) to display simple, pretty image captions that appear on rollover

WMD is a simple, lightweight HTML editor for blog comments, forum posts, and basic content management. You can add WMD to any textarea with one line of code. Add live preview with one line more. WMD works in nearly all modern browsers, and is now completely free to use.

With this plugin, you can create a scalable tooltip by just using a single background image for the tooltip body.

PaintbrushJS is a lightweight, browser-based image processing library that can apply various visual filters to images within a web page.

JSViz makes it easy to create dynamic 2D views of information. Practical applications include network graphs, navigation, and other dynamic layouts.

The Sexy Curls jQuery Plugin is an open-source jQuery plugin by Elliott Kember which lets you share in the beauty of the page fold.

A simple web-based WYSIWYG editor, written in MooTools.

scriptaculous replacement

HotKey provides functionality similar to the accesskey attribute, but has many enhancements that allow for more granular control when creating keyboard driven interfaces.

WKRTE is a jQuery rich text editor based on lwrte by plandem.