aria-brailleroledescription attribute defines a human-readable, author-localized abbreviated description for the role of an element intended to be converted into Braille.
Braille is not a one-to-one transliteration of letters and numbers, but rather it includes various abbreviations, contractions, and characters that represent words (known as lolograms).
Instead of converting long role descriptions to Braille, the
aria-brailleroledescription attribute allows for providing an abbreviated version of the
aria-roledescription value, which is a human-readable, author-localized description for the role of an element, for improved user experience with Braille interfaces.
Basically, the value of
aria-brailleroledescription is an abbreviated version of the
aria-roledescription attribute to be converted into Braille.
<article aria-roledescription="slide" aria-brailleroledescription="sld" aria-labelledby="slide1heading"> <h1 id="slide1heading">Welcome to my talk</h1> <img alt="Me" src="images/me.jpg" /> </article>
Most assistive technologies, like screen readers, will read the above as "slide, welcome to by talk. Image, Me." Braille assistive technologies will present "sld welcome to my talk gra me" in Braille. The semantic
<article> is given the role of "slide" by the
aria-roledescription attribute; "slide" being a role not defined in the specification, but is a common role for slides in a presentation. In Braille, the role is presented as "sld". The "gra" is short for "graphic", which is how the "image" role is shortened in Braille.
aria-brailleroledescription attribute should only be used to clarify the purpose of non-interactive container roles like "group" or "region", or to provide a more specific description of a widget in a braille context.
aria-brailleroledescription attribute overrides how assistive technologies localize and express the name of a role in Braille, inappropriate values will prevent users from understanding and interacting with an element on braille interfaces.
aria-roledescription is present. However, if the
aria-roledescription value works in Braille, the Braille version of the attribute is not needed. In general,
aria-brailleroledescription should only be used in the rare case when a
aria-roledescription is too verbose for Braille.
A few rules to remember:
- Only apply
aria-brailleroledescriptionto elements with a valid ARIA role or elements with implicit role semantics.
aria-brailleroledescription, if present, must have a non-empty, none null value that is different from the
aria-roledescriptionvalue, which, in turn, is different from the ARIA explicit or role or implicit semantic role.
- Avoid using Unicode Braille Patterns. If they must be used, ensure the
aria-brailleroledescriptionvalue contains content other than Unicode Braille Patterns, whitespace, and Braille Pattern dots-0.
- Ensure the value is always localized to the document's language.
Warning: If the content is only in Unicode Braille Patterns, the value will not be translated according to the user's preferred translation table.
Note: Do NOT use
aria-brailleroledescription to replicate
aria-roledescription. Only include this attribute when
aria-roledescription does not provide an adequate braille representation.
aria-brailleroledescription value will not be exposed to the braille user if:
- The value is empty or contains only whitespace characters or the empty Braille pattern: dots-0 (U+2800).
- The element to which the attribute is applied has an explicit or implicit WAI-ARIA role where
aria-brailleroledescriptionis prohibited, including the
- The element to which the attribute is applied does not have a valid
Note: Test your sites and applications with daily users of assistive technologies, including Braille readers, to ensure your content makes sense in Braille.
The value is a string, an unconstrained value type, that is intended to be converted into Braille
Used in ALL roles (except
|Accessible Rich Internet Applications (WAI-ARIA) |