Summary
This test consists in checking whether each heading of the page is relevant.
Business description
Criterion
Test
Description
Dans chaque page web, le contenu de chaque titre (balise
<hx>
ou balise possédant un attribut WAI-ARIArole="heading"
associé à un attribut WAI-ARIAaria-level
) est-il pertinent ?
Technical notes (criterion 9.1)
WAI-ARIA permet de définir des titres via le rôle
heading
et l’attributaria-level
(indication du niveau de titre). Bien qu’il soit préférable d’utiliser l’élément de titre natif en HTML<hx>
, l’utilisation du rôle WAI-ARIAheading
est compatible avec l’accessibilité.Bien que la spécification HTML5 autorise l’utilisation exclusive de titres de niveau 1 (
h1
), le manque de support des technologies d’assistance oblige à utiliser une hiérarchie de titres pertinente.
Level
A
Technical description
Scope
Page
Decision level
Semi-Decidable
Algorithm
Selection
Set1
All the <Hx>
tags where x is comprise between 1 and 6 and all the tags with a role
attribute equals to heading
and
an aria-level
attribute.
CSS selector:
h1, h2, h3, h4, h5, h6,
[role=heading][aria-level]
Process
Test1
For each element of Set1, we check whether the content of the tag is pertinent (see Notes about relevancy detection).
For each element returning false in Test1, raise a MessageA. Raise a MessageB instead.
MessageA : Not pertinent heading
- code: NotPertinentHeading
- status: Failed
- parameter: tag text, tag name, snippet
- present in source: yes
MessageB : Check heading pertinence
- code: CheckHeadingPertinence
- status: Pre-Qualified
- parameter: tag text, tag name, snippet
- present in source: yes
Analysis
Not Applicable
- The page has no
<Hx>
tag - The page has no tag with heading semantic (role=“heading” and aria-level=“Integer”)
(Set1 is empty)
Failed
At least one element of Set1 has an empty content or a content only composed of non alphanumerical characters (Test1 returns false for at least one element)
Pre-Qualified
In all other cases
Notes
Definition of not-pertinent legend :
A heading is seen as not-pertinent in the following cases :
- the content of the tag is empty
- the content of the tag only contains non alphanumerics characters