Rule 10.4.1
Summary
Check wether a forbidden unit is present in all CSS media types screen, tv, handheld and projection.
Business description
Criterion
Test
Description
Dans les feuilles de styles du site web, les unités non relatives (
pt,pc,mm,cm,in) ne doivent pas être utilisées pour les types de médiascreen,tv,handheld,projection. Cette règle est-elle respectée (hors cas particuliers) ?
Particular cases (criterion 10.4)
Dans le cas des textes en image et des sous-titres de vidéo le critère est non applicable.
Level
AA
Technical description
Scope
Page
Decision level
Decidable
Algorithm
Selection
Set1**
All the css Rules whose media is screen, tv, handheld and projection.
Used nomenclature
- MediaListNotAcceptingRelativeUnits
Process
Test1
Check whether the properties of the css rules of Set1 use a forbidden unit (pt, pc, mm, cm, in, defined in the “RelativeCssUnits” nomenclature).
For each occurence returning true, raise a MessageA
Test2
A messageB is raised indicating that this css have to checked manually
MessageA : Bad Unit type
- code: BadUnitType
- status: Failed
- parameter: css-selector name
- present in source: yes
MessageB : Untested resource
- code: UnTestedResource
- status: Pre-Qualified
- parameter: the resource name
Analysis
Passed
No property of css rules of Set1 uses a forbidden unit (Test1 returns false for all the elements of Set1)
Failed
At least one css-rule of Set1 contains a property that uses a forbidden unit (Test1 returns true for at least one ement of Set1)
Pre-Qualified
If a css could not have parsed, and so not tested for any reason AND no property of css rules of Set1 uses a forbidden unit (Test1 returns false for all the elements of Set1)