ARIA heading role: aria-level is required #39482
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See the [ARIA 1.3 specification for heading](https://www.w3.org/TR/wai-aria-1.3/#heading): > To ensure elements with a role of heading are organized into a logical outline, authors MUST use the aria-level attribute to indicate the proper nesting level.
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defaulting to a level of 2 is how the role was previously spec'd, and it is what browsers are instructed to do to mitigate author error for not requiring a level. see in section 9.2 States and Properties, the Fallback values for missing required attributes table. it's listed there that level 2 is the fallback value for an undefined aria-level on an element with a role of heading |
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Description
Changes the description of the ARIA heading role’s aria-level attribute to state that it is required, rather than stating that it defaults to 2.
Motivation
See the ARIA 1.3 specification for heading:
Additional details
The MDN page on the aria-level role already states that the heading role is required.
I’m not sure where the “If no level is present, a value of 2 is the default” claim comes from.
Related issues and pull requests
None.