The WCAG 2.2 was published in October 2023 and was designed to be backwards compatible, meaning that websites that conform to WCAG 2.2 will also conform to WCAG 2.0/2.1 (and therefore to policies that reference WCAG 2.0/2.1). The W3C advises the use of WCAG 2.2 to maximize future applicability of accessibility efforts. The W3C also encourages use of the most current version of WCAG when developing or updating Web accessibility policies.
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How to Meet WCAG 2.2 - A customizable quick reference to WCAG 2.2 requirements (success criteria) and techniques.
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Understanding WCAG 2.2 - For people who want to understand the guidelines and success criteria more thoroughly. It provides additional information about the intent, benefits, examples, and resources.
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WCAG in Plain English - This resource by AAArdvark helps make accessibility standards easy to understand.