Many web pages today have their content dynamically changed using Javascript. An example of this is the search page on this blog. When the page is initially loaded, the only content in the <main> section of the page is a search form. But, when you type in a...

When we hear the world “visibility”, we tend to only think of vision. But the visibility: hidden rule actually affects different kinds of visibility - visual, spatial, assistive technology, and interaction - in different ways....

Knowing where to start with accessibility testing can be difficult and overwhelming. In my article on Tools for Developing Accessible Websites, I mentioned 5 tools you can use to get started developing more accessible websites. More recently, I have discovered an incredibly powerful tool - pa11y Introducing pa11y pa11y, pronounced...

The Web Accessibility Initiative's Accessible Rich Internet Applications Suite (WAI-ARIA, or just ARIA) is a set of tools and guidelines for making web content and applications more accessible. Most notably, it includes a suite of attributes we can add to HTML elements to embed in them more semantic information that...

In one of my previous articles, Using Heading Elements to Create a Document Outline, I explained the importance of having valid outlines in an HTML page. The outline for an HTML document shows the structure of the content on the page. This is useful for user agents, who can use...