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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

November 2025

October 2025

The London School of Economics and Political Science

	Title / URL	Issues
	Research for the World \| LSE online magazine with global impactwww.lse.ac.uk/research/research-for-the-world	13
	middleeastcentrewww.lse.ac.uk/middleeastcentre	3
	Find support at LSEwww.lse.ac.uk/find-support	2
	Search Peoplewww.lse.ac.uk/People/Search-People	2
	Search Peoplewww.lse.ac.uk/people/search-people	2
	Collection highlights \| LSE Library - LSEwww.lse.ac.uk/library/collection-highlights	1
	About \| LSE Library - LSEwww.lse.ac.uk/library/about	1
	LSE Events FAQ - LSEwww.lse.ac.uk/events/lse-events-faqs	1
	Opening hours \| LSE Library - LSEwww.lse.ac.uk/library/about/opening-hours	1
	Research support \| LSE Library - LSEwww.lse.ac.uk/library/research-support	1

Fix missing ARIA label IDs

The London School of Economics and Political Science

Where this issue has occurred