If you are writing any amount of Javascript, you are probably using closures to hide local state, e.g. to have...

tl;dr: Use event.currentTarget unless you are absolutely certain that you need event.target. Since it hasn't been written down...

Get an idea of the varying support for HTML/CSS/JavaScript features in different browsers like Chrome, Firefox, Internet Explorer, Edge...

Learn Enough Command Line to be Dangerous (it's in our library => Google Drive) CLI tricks every developer should...

CSS (+ some Javascript) framework, implementing Google's material design for static web pages. Can be used for plain websites without...

JavaScript is a scripting language supported by all browsers. Browsers don't speak Ruby, so if we want to implement...

Rails is our web framework. Goals Be able to write a simple Rails application. Understand how Rails talks to the...

Disabling auto-complete in login forms is probably a bad idea, since it encourages weak passwords. If you are still...

SmartUnderline is an open-source JavaScript library which uses clever tricks to draw underlines in a more beautiful and readable...

Insanely detailled guide about controlling copy & paste behavior using web technology in 2015. Note that you can now trigger a...

Developing complex regular expressions quickly blows my mind. Here are some online regex editors that help you by highlighting matching...

Note: Making a reverse proxy with nginx is much more straightforward. A reverse proxy is a "man in the middle...

When you register a delegated event using on (or the deprecated delegate / live), it is somewhat hard to manually trigger...

All major browsers (IE8+, FF3.5+, Safari 4+, any Chrome) support sessionStorage, a JavaScript storage object that survives page reloads and...

Small (1.5 KB) Javascript library that lets you render tables, lists, etc. with hundreds of thousands of items.

When ending a Selenium test Capybara resets the browser state by closing the tab, clearing cookies, localStorage, etc.

If you are using Coffeescript, it is likely to be the culprit. Since Coffeescript always returns the value of...

Webfonts are not always available when your JavaScript runs on first page load. Since fonts may affect element sizes, you...

jQuery doesn't store information about event listeners and data values with the element itself. This information is instead stored...

This guide shows how to create an AngularJS application that consumes more and more memory until, eventually, the browser process...

The easiest way to detect touch-capable browsers is to check for the presence of touch events. It is no...

The Javascript in operator does what Hash#has_key? does in Ruby: Return whether an object has a property.

When testing code that uses pushState / replaceState, your browser will appear to navigate away from http://localhost:3000/specs (or wherever...