1357153 - Ignore aria-{row,col}span values when host language {row,col}span attribute is present

Status: NEW

(Core :: Disability Access APIs, defect, P3)

Description

[Joanmarie Diggs]

In ARIA 1.1, aria-rowspan and aria-colspan were added. The ARIA spec states the following:

    If aria-{row,col}span is used on an element for which the host
    language provides an equivalent attribute, user agents must ignore
    the value of aria-{row,col}span and instead expose the value of the
    host language's attribute to assistive technologies.

See:
* https://rawgit.com/w3c/aria/master/aria/aria.html#aria-rowspan
* https://rawgit.com/w3c/aria/master/aria/aria.html#aria-colspan

Steps to reproduce:

1. Load data:text/html,<table><tr><th id="test" role="columnheader" rowspan="3" aria-rowspan="2">test cell</th></tr></table>
2. Use Accerciser to examine the element

Expected result: "rowspan:2" would not be in the accessible object attributes.
Actual result: "rowspan:2" is in the accessible object attributes.

3. Load data:text/html,<table><tr><th id="test" role="columnheader" colspan="3" aria-colspan="2">test cell</th></tr></table>
4. Use Accerciser to examine the element

Expected result: "colspan:2" would not be in the accessible object attributes.
Actual result: "colspan:2" is in the accessible object attributes.

Comment 1

[David Bolter [:davidb] (NeedInfo me for attention)]

This is something we should triage and fix but isn't among our most urgent bugs.(Contributions welcome as always!)