University of London

First time visit: View without clicking anything

The Student Insider | University of London

Past events | University of London

News | University of London

Our blogs | University of London

Events | University of London

Student blog | University of London

Our libraries and collections | University of London

Student policies | University of London

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

July 2025

June 2025

Title / URL	Issues
University of Londonwww.london.ac.uk/	5
First time visit: View without clicking anythingwww.london.ac.uk/	5
The Student Insider \| University of Londonwww.london.ac.uk/news-events/student-insider	4
Past events \| University of Londonwww.london.ac.uk/news-events/past-events	4
News \| University of Londonwww.london.ac.uk/news-events/news	4
Our blogs \| University of Londonwww.london.ac.uk/news-events/blogs	4
Events \| University of Londonwww.london.ac.uk/news-events/events	4
Student blog \| University of Londonwww.london.ac.uk/news-events/student-blog	4
Our libraries and collections \| University of Londonwww.london.ac.uk/about/services/libraries-collections	3
Student policies \| University of Londonwww.london.ac.uk/current-students/student-policies	3

Fix missing ARIA label IDs

University of London

Where this issue has occurred