Rule 1.1.1

Summary

This test consists in checking whether each <img> tag is defined with an "alt" attribute.

Business description

Criterion

1.1

Test

1.1.1

Description

Chaque image (balise img) a-t-elle un attribut alt ?

Level

A

Technical description

Scope

Page

Decision level

Decidable

Algorithm

Selection

Set1

All the <img> tags (css selector : img)

Process

Test1

For each element of Set1, test the presence of the "alt" attribute.

For each occurrence of false-result of Test1, raise a MessageA

MessageA : Missing Alt attribute

• code : AltMissing
• status: Failed
• parameter : "src" attribute, tag name, snippet
• present in source : yes

Analysis

Passed

All the <img> tags of the page have an "alt" attribute (Test1 returns true for all the elements of Set1)

Failed

At least one <img> tag has no "alt" attribute (Test1 returns failed for at least one element)

Not Applicable

The page has no <img> tag (Set1 is empty)