Global Locations | Carnegie Mellon University

Alumni Association | Engage with CMU

Faculty & Staff Resources | Carnegie Mellon University

Leadership | Carnegie Mellon University

Traditions | Carnegie Mellon University

History | Carnegie Mellon University

Student Admission | Carnegie Mellon University

Student Resources | Carnegie Mellon University

Campus Life | Carnegie Mellon University

About Carnegie Mellon | Carnegie Mellon University

When specifying accessible names via `aria-labelledby`, ensure that the 
label elements exist.

## Explanation

Accessible names are required for many parts of a page, including form controls.
One way to accomplish this is to use `aria-labelledby` to specify the ID or IDs of 
other elements which contain a label. For example:

```html
<h2 id="dialog-labell">Important message!</h2>
<dialog aria-labelledby="dialog-label">
```

In this example, the `aria-labelledby` for the `<dialog>` points to an ID of `dialog-label`,
which doesn't exist. The heading it refers to instead has an ID of `dialog-labell`, presumably 
a typo.

## Why this matters

It isn't usually clear when an accessible name is broken, even during user testing.

This check helps to identify where an element clearly intended to have a label, but
that label is missing.

When a label is broken, it may be impossible for a user of assistive technologies
to understand what that element does.

missing-aria-labelled-by

December 2025

November 2025

Carnegie Mellon University

Title / URL	Issues
Global Locations \| Carnegie Mellon Universitywww.cmu.edu/global	1
Alumni Association \| Engage with CMUwww.cmu.edu/engage/get-involved/alumni-association	1
Faculty & Staff Resources \| Carnegie Mellon Universitywww.cmu.edu/faculty-staff	1
Leadership \| Carnegie Mellon Universitywww.cmu.edu/leadership	1
Traditions \| Carnegie Mellon Universitywww.cmu.edu/about/traditions	1
History \| Carnegie Mellon Universitywww.cmu.edu/about/history	1
Student Admission \| Carnegie Mellon Universitywww.cmu.edu/student-admission	1
Student Resources \| Carnegie Mellon Universitywww.cmu.edu/current-students	1
Campus Life \| Carnegie Mellon Universitywww.cmu.edu/campus-life	1
About Carnegie Mellon \| Carnegie Mellon Universitywww.cmu.edu/about	1

Fix missing ARIA label IDs

Carnegie Mellon University

Where this issue has occurred