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This is an early unpublished editor's draft; content is incomplete and subject to change.

Text reflow supported

supplemental

Normative Text

Blocks of text are legible at 320 CSS pixels in the orientation of text, without the need to scroll in the orientation of text.

Except when

  • The meaning of text relies on a two dimensional structure. For example, preformatted text such as code, poems, maps, or comics.

Other languages may have other rules around line breaking: https://r12a.github.io/scripts/script-features/index.html

Tests

This section is non-normative.

HTML paragraph reflow without requiring scrolling in two dimensions

Procedure

For each page/view:

  1. Set the viewport at 320 CSS pixels in the direction of text.
  2. Identify all the blocks of text within the scope.
  3. Check that each block of text does not require scrolling into two dimensions.
  4. Check that the text in each block of text is legible.

Expected results

  • #3 and #4 are true.

Tests

This content needs to be written.

Key Terms

accessibility support set

group of user agents and assistive technologies you test with

The AGWG is considering defining a default set of user agents and assistive technologies that they use when validating guidelines.

Accessibility support sets may vary based on language, region, or situation.

If you are not using the default accessibility set, the conformance report should indicate what set is being used.

accessibility supported

available and working in the user agents and assistive technology in the accessibility support set

The working group intended to include a default accessibility support set. See Default accessibility support set #277.

block of text

more than one sentence of text

css pixel

visual angle of about 0.0213 degrees

A CSS pixel is the canonical unit of measure for all lengths and measurements in CSS. This unit is density-independent, and distinct from actual hardware pixels present in a display. User agents and operating systems should ensure that a CSS pixel is set as closely as possible to the CSS Values and Units Module Level 3 reference pixel [css3-values], which takes into account the physical dimensions of the display and the assumed viewing distance (factors that cannot be determined by content authors).

human language

language that is spoken, written, or signed (through visual or tactile means) to communicate with humans

See also sign language.

programmatically determinable

meaning of the content and all its important attributes can be determined by software functionality that is accessibility supported

sign language

a language using combinations of movements of the hands and arms, facial expressions, or body positions to convey meaning

text

sequence of characters that can be programmatically determined, where the sequence is expressing something in human language