This card shows how to upgrade a Rails 2 application from Rails 2.3.8 through every single patch level up to...

Coffeescript allows you to create classes whose methods are automatically bound to the correct this. You can do this by...

Our development process makes us deploy very often. As the number of releases grows, junk clogs up the hard drive...

Getting a regular expression from a string in JavaScript is quite simple: new RegExp('Hello Universe'); # => /Hello Universe/

Authentication is hard: there are many edge cases, and most users (including yourself) usually only go the "happy path" once...

Note: This technique is confusing and slows down your test suite. Copy the attached code to features/support. This gets you...

TL;DR: Variables not declared using var are stored outside the current scope, most likely in the global scope (which...

Rails’ reputation as a relatively secure Web framework is well deserved. Out-of-the-box, there is protection against many...

When a controller action redirects to an external URL (like http://somehost.com/some/path) you will find that this is hard...

Great presentation about writing Javascript like you write everything else: Well-structured and tested. JavaScript is no longer a toy...

Chart.js seems to be a good alternative to Google's Chart API and other commercial chart drawing libraries.

Don't Google this, you will lose all will to live. Instead use Object#isEqual() from Lodash or Underscore.js:

If you open a pop-up window [1] in your Selenium tests and you want to close it, you can...

JavaScripts and CSS should be minified for production use. In Rails 3.1+ the asset pipeline will take care of this...

If you need to capture signatures on an IPad or similar device, you can use Thomas J Bradley's excellent...

A tooltip library that does not use Javascript. Works in IE9+. This library (or the technique used by it) could...

January has been a very bad month for Ruby on Rails developers, with two high-severity security bugs permitting remote...

Spreewald now comes with a step that tests if a form field is visible: Then the "Due date" field should...

The attached article outlines considerations when choosing client-side vs. server-side implementations of the Google Geocoding APIs (geocoder, directions...

So you want to find out how many horizontal pixels you have available on a mobile device. This is super...

Tracekit is a JavaScript library that automatically normalizes and exposes stack traces for unhandled exceptions across the 5 major browsers...

The basic idea is pretty simple: an element's height is accessible via the offsetHeight property, its drawn height via...

This works in all relevant browsers: document.activeElement You can use this in your Selenium steps, for example, to assert that...