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SC4-1-1-idrefs
From Automated WCAG Monitoring Community Group
This test belongs to 4.1.1 Parsing.
Status
Contents
Description
This test checks that each element referred to from an idrefs attribute exists.
Background
- F17: Failure of Success Criterion 1.3.1 and 4.1.1 due to insufficient information in DOM to determine one-to-one relationships (e.g., between labels with same id) in HTML
- eGovMon test ID: F17-2
Assumptions
no known assumptions
Test properties
| Property | Possible values |
|---|---|
| Success Criterion | 4.1.1 Parsing |
| Test mode | automatic |
| Test environment | DOM |
| Test subject | single web page |
Test procedure
Selector
Test mode:
earl:automatic
Select each td and th element with a headers attribute, and each element with an aria IDREFS attribute. The CSS selector "td[headers], th[headers], *[aria-controls], *[aria-describedby], *[aria-flowto], *[aria-labelledby], *[aria-owns]" can be used.
Step 1
Test mode:
earl:automatic
- Make a list of idRefVals by splitting the IDREFS attribute on whitespace characters
- Trim each value in idRefVals by removing all whitespace characters
- FOR EACH idRefVal in idRefVals
- Get element IdTarget, by looking up the first element that has an ID attribute that matches idRefVal
- IF idTarget exists:
- Return SC4-1-1-idrefs-pass1
- ELSE:
- Return SC4-1-1-idrefs-fail1
| Property | Value |
|---|---|
| TestCase | SC4-1-1-idrefs |
| Identifier | SC4-1-1-idrefs-pass1 |
| Outcome | passed |
| Pointer | selector result |
| Info |
| Property | Value |
|---|---|
| TestCase | SC4-1-1-idrefs |
| Identifier | SC4-1-1-idrefs-fail1 |
| Outcome | failed |
| ErrorMessage | The attribute {IDREFS attribute} refers to an element with the id {idRefVal} which does not exist on the page. |
| Pointer | selector result |
| Info |