Accessibility guides

This page lists guides for web accessibility. They're intended to help you understand what kinds of things are possible to improve the accessibility of your projects on the web.

Accessibility and spatial patterns: This document describes visual patterns that can induce physical symptoms in people who have photosensitive epilepsy, vestibular disorders, or other perceptual issues.
Accessibility information for web authors: This document lists guidelines and regulations, how-to's, and tools for checking and repairing accessibility problems with websites.
Accessibility: What personalization helps browse more safely: This article discusses making web content accessible for those with vestibular disorders, and those who support them, by taking advantage of personalization and accessibility settings built into the operating systems. Taking advantage of personalization settings can help prevent exposure to content leading to seizures and / or other physical reactions.
An overview of accessible web applications and widgets: Most JavaScript libraries offer a library of client-side widgets that mimic the behavior of familiar desktop interfaces. Sliders, menu bars, file list views, and more can be built with a combination of JavaScript, CSS, and HTML. Since the HTML4 specification doesn't provide built-in tags that semantically describe these kinds of widgets, developers typically resort to using generic elements such as div and span. While this results in a widget that looks like its desktop counterpart, there usually isn't enough semantic information in the markup to be usable by an assistive technology.
Cognitive accessibility: Cognitive accessibility covers accessibility considerations for people with cognition and learning disabilities. This document introduces cognitive accessibility and improving accessibility of the web for people with cognitive and learning differences.
Keyboard-navigable JavaScript widgets: Web applications often use JavaScript to mimic desktop widgets such as menus, tree views, rich text fields, and tab panels. These widgets are typically composed of div and span elements that do not, by nature, offer the same keyboard functionality that their desktop counterparts do. This document describes techniques to make JavaScript widgets accessible with the keyboard.
Mobile accessibility checklist: This document provides a concise checklist of accessibility requirements for mobile app developers. It is intended to continuously evolve as more patterns arise.
Understanding the Web Content Accessibility Guidelines (WCAG): This set of articles provides quick explanations to help you understand the steps that need to be taken to conform to the recommendations outlined in the WCAG (WCAG).
Web accessibility for seizures and physical reactions: This article introduces concepts behind making web content accessible for those with vestibular disorders, and how to measure and prevent content leading to seizures and/or other physical reactions.
Web Accessibility: Understanding Colors and Luminance: While understanding color, luminance, and saturation is important for design and readability for all sighted users, they are essential for those with reduced vision and color-deficient vision and those with specific neurological, cognitive, and other impairments.