This page is an archive of changes to the knowledge base made in 2021. For the latest changes to the site, refer to the site what's new page.
Changes are listed from most recent to oldest.
- November 26, 2021 — WCAG Explainers
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A new set of WCAG explainer documents is now available. These documents provide brief overviews of the WCAG success criteria to help understand their purpose and how to meet them. The documents are not intended as replacements for the more detailed information on this site, but to help locate where that information is.
- November 18, 2021 — Input Validation
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A new page explaining techniques for validating form input is now available.
- October 20, 2021 — Icons
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A new page explaining how to make icons accessible is now available.
- October 8, 2021 — Abbreviations
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A new page explaining how to make abbreviations accessible is now available.
- October 7, 2021 — Glossaries
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A new page explaining the structuring of glossaries is now available.
- July 31, 2021 — Endnotes
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New guidance for tagging endnotes is now available. The
doc-endnoterole is no longer recommended for use. - July 21, 2021 — Timers
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A new page explaining the need for users to control time limits is now available.
- July 21, 2021 — Keyboard Control
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A new page explaining the need for users to control all content functionality through their keyboard is now available.
- July 16, 2021 — Reflow
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A new page explaining the WCAG reflow requirement is now available. This page provides guidance for both reflowable and fixed layout publications.
Note, however, that the fixed layout guidance is expected to be revised in line with work going on in W3C on accessible fixed layout publications.
- July 12, 2021 — Additional Context for Technique Links
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Each technique on a knowledge base page (in the Techniques section) identifies and provides a link to its corresponding WCAG success criterion. These links now also identify the WCAG level (A, AA, or AAA) of the success criterion to help understand which techniques are required to meet each level.
- July 7, 2021 — Text Resizing
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A new page explaining the need to use flexible units of measure for font sizes and element dimensions to allow accessible resizing of content is now available.
- June 10, 2021 — Orientation
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A new page explaining the problem of constraining the rendering orientation of fixed layout pages is now available.
- June 9, 2021 — Expanded Image Coverage
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The discussion of image accessibility has been split into multiple pages to allow better coverage of the different issues. There are now separate pages covering image descriptions, images of text, animated graphics, and decorative images. These topics are grouped under the heading Images in the HTML section of the table of contents.
- June 4, 2021 — Updated Audio and Video Guidance
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The Audio and Video pages have undergone minor review to ensure that all relevant WCAG techniques are linked, that the examples better reflect accessibility requirements, and to more clearly describe the alternatives required for WCAG conformance.
- June 3, 2021 — Autocomplete
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A new page covering how to use the
autocompleteattribute to aid users in filling in forms is now available. - April 15, 2021 — Contributing
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Information on how to contribute new pages to the knowledge base is now available. A link to this page is also available at the bottom of each page.
- March 19, 2021 — Drop Caps
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A new page covering drop caps and the problems the present for users is now available.
- March 18, 2021 — Updated Note Reference Guidance
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The guidance about using the HTML
suptag for footnote references has been updated. Until there is better support for thedoc-noterefrole in assistive technologies, using superscript tagging as an extra indication of the nature of the references is acceptable. - February 23, 2021 — Updated Decorative Image Guidance
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Added additional clarification about using the
noneandpresentationroles with decorative images. - February 23, 2021 — Updated Landmarks Guidance
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Additional examples and frequently asked questions have been added to the page on HTML landmarks to help explain the effect of headings on landmarks.