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.

To read the W3C definitions for Robust and its guidelines and success criteria, see Principle 4: Robust — Content must be robust enough that it can be interpreted reliably by a wide variety of user agents, including assistive technologies.

Guideline 4.1 — Compatible: Maximize compatibility with current and future user agents, including assistive technologies

This guideline focuses on making content as compatible as possible, not only with current user agents (e.g., browsers), but also with future ones too.

Also see the WCAG description for Guideline 4.1: Compatible: Maximize compatibility with current and future user agents, including assistive technologies.

See also

• WCAG

  1. Perceivable

  2. Operable

  3. Understandable

  4. Robust