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Wcag reflow7/26/2023 ![]() dfn-CSS-pixelįrom the WCAG 2.2 definition for CSS pixel:Ī CSS pixel is the canonical unit of measure for all lengths and measurements in CSS. ![]() Note: CSS pixel measurements would have to be converted to another measurement for non-web technologies. Note: It is likely that for software there will be more frequent cases where two-dimensional layout are required for usage or meaning. Note: Some software runs on technologies where there is no method to zoom content to 400% or reflow content, or the screen is smaller than a mobile device it would not be possible to meet this success criterion with those technologies. Some potential notes for the WCAG2ICT guidance: **NOTE: **I've started a discussion thread regarding caveats and thoughts about applying this SC to non-web documents and software. Do non-web document authors have any control over scrolling, or is that strictly up to the document viewer (user agent)? I have seen PDF documents that are provided book-style where the pages flip.What is the equivalent size of 320 x 256 CSS pixels (and how do you measure that) in non-web documents or software?. ![]() Some screens are so small that horizontal and vertical scrolling are needed to access all of the capabilities of the device.printers) may not have available memory to support reflow capabilities or another version of the layout that supports single-direction scrolling. Many products with really small size screens (e.g.It is acceptable to provide two-dimensional scrolling for such parts of the content.ĭISCUSSION NEEDED We need a discussion to happen before notes are developed, based on some circumstances I have been thinking about: NOTE: Examples of content which requires two-dimensional layout are images required for understanding (such as maps and diagrams), video, games, presentations, data tables (not individual cells), and interfaces where it is necessary to keep toolbars in view while manipulating content. For which is designed to scroll horizontally (e.g., with vertical text), 256 CSS pixels is equivalent to a starting viewport height of 1024 CSS pixels at 400% zoom. NOTE: 320 CSS pixels is equivalent to a starting viewport width of 1280 CSS pixels wide at 400% zoom. This applies directly as written, and as described in Intent from Understanding Success Criterion 1.4.10 (also provided below), replacing “web content” with “content”. Additional Guidance When Applying Success Criterion 1.4.10 to Non-Web Documents and Software: ![]() It is acceptable to provide two-dimensional scrolling for such parts of the content. For web content which is designed to scroll horizontally (e.g., with vertical text), 256 CSS pixels is equivalent to a starting viewport height of 1024 CSS pixels at 400% zoom. ![]()
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