Sorry, er ging iets mis | Radboud Universiteit

Radboud Universiteit

About Radboud University | Radboud University

Bereikbaarheid | Radboud Universiteit

Research at Radboud University | Radboud University

Agenda | Radboud Universiteit

Come work with us | Radboud University

Students | Radboud University

First time visit: View without clicking anything

Kom werken bij ons | Radboud Universiteit

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

February 2026

January 2026

Radboud University

	Title / URL	Issues
	Sorry, er ging iets mis \| Radboud Universiteitwww.ru.nl/invented-url-for-404-page	1
	Radboud Universiteitwww.ru.nl/	1
	About Radboud University \| Radboud Universitywww.ru.nl/en/about-us	1
	Bereikbaarheid \| Radboud Universiteitwww.ru.nl/over-ons/bereikbaarheid	1
	Research at Radboud University \| Radboud Universitywww.ru.nl/en/research	1
	Agenda \| Radboud Universiteitwww.ru.nl/over-ons/agenda	1
	Come work with us \| Radboud Universitywww.ru.nl/en/working-at	1
	Students \| Radboud Universitywww.ru.nl/en/students	1
	First time visit: View without clicking anythingwww.ru.nl/	1
	Kom werken bij ons \| Radboud Universiteitwww.ru.nl/werken-bij	1

Fix missing ARIA label IDs

Radboud University

Where this issue has occurred