WCAG versioning, explained
Ever wondered about those numbers and letters next to WCAG? Check out our handy infographic breaking down WCAG versioning and what it means for web accessibility.
WCAG 1.0: The beginnings
Written 1999
Foundational principles of WCAG
Focus: HTML and CSS
Not directly referenced today
WCAG 2.0: The evolution
Released Dec 2008
More comprehensive and technologically-neutral
Shaped todayβs WCAG, introducing categorization principles and conformance levels
25 criteria at A, 13 at AA and 23 at AAA
Mandated for US, Canada and Australia
WCAG 2.1: Bridging the gap
Released June 2018.
Adds 17 criteria on top of WCAG 2.0
Attempts to address mobile web, cognitive disabilities, low vision
Mandated for New Zealand, European Union and UK
WCAG 2.2: The latest
To be released 2023
Adds 9 criteria on top of WCAG 2.0 and 2.1
Covers mobile web, low vision, cognitive and learning disabilities, authentication
Not mandated anywhere yet
WCAG 3.0: Looking ahead
In working draft
Aims to be more flexible and adaptable to different UX and technologies, plus address gaps
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