In this beginner’s accessibility tutorial we’re going to learn what ARIA is, why it is necessary to write our HTML with ARIA in mind, what ARIA roles,...

Pa11y provide a set of free and open-sourced tools to help developers and designers build accessible web pages. The main Pa11y tool is a command line...

Linters have been around for a good while; but if you’re new to CSS this might be the first you’ve heard about them. A CSS linter will keep your stylesheets...

There is a situation where the margin between one element and that of a neighbor will merge into a unified space. This is a “collapsing margin”, and in this...

In this tutorial I’ll explain how the confusing world of CSS inheritance works. We’ll look at the inherit, initial, unset, and revert CSS keywords.

Selectors used to target elements depending on their “state” are called pseudo-classes. nth-child and nth-of-type are pseudo-classes; let’s learn more about...

When working with CSS conflicting styles can be a thorn in your side, especially when you don’t know where the conflict is originating from. This tutorial...

The default approach to building websites when working with HTML and CSS is to write the structure in the HTML file and implement the styles in a CSS file....

In this tutorial, you will learn how to allow users of your application to log in using their Twitter account. Doing this has been made easy with tools such...

Pundit is a tool that allows you to restrict certain parts of your Rails application to authorized users. It does this by providing you with certain helpers....

Clearance is a simple authentication system with email and password built by the team at Thoughtbot. It has opinionated defaults but is intended to be easy...

In the first part of the tutorial, we learned how to install Devise and set it up in our Rails application. In this part, we will look at how to integrate...