This article provides practical advice on how to write your web content so that it conforms to the success criteria outlined in the Robust principle of the Web Content Accessibility Guidelines (WCAG) 2.0 and 2.1. Robust states that content must be robust enough that it can be interpreted reliably by a wide variety of user agents, including assistive technologies. This can generally be achieved by following web standards and testing rigorously....also by screen reader users, keyboard-only users, etc. See HTML:...