Form-Associated Custom Elements Associated to Labels Are Not Read

[break-stuff]

Steps to reproduce:

• Turn on NVDA
• Go to https://cdpn.io/break-stuff/fullpage/qBQPGVb?nocache=true&view=fullpage
  • Source: https://codepen.io/break-stuff/pen/qBQPGVb
• Focus on the input element

Actual behavior:

The label is not being read when focused on the input element.

Expected behavior:

When using the ElementInternals API, form-associated custom elements should be able to be referenced by <label> elements using the for attribute and it should be read when focused.

NVDA logs, crash dumps and other attachments:

System configuration

NVDA installed/portable/running from source:

NVDA version:

2023.1

Windows version:

10.0.22621 Build 22621

Name and version of other software in use when reproducing the issue:

Other information about your system:

Other questions

Does the issue still occur after restarting your computer?

Yes

Have you tried any other versions of NVDA? If so, please report their behaviors.

No

If NVDA add-ons are disabled, is your problem still occurring?

Yes

Does the issue still occur after you run the COM Registration Fixing Tool in NVDA's tools menu?

I'm not sure

[seanbudd]

In this case the label is being associated with the parent "my-input" tag, rather than the input box.
It seems that invalid HTML is being generated here.

[break-stuff]

@seanbudd This is by design as it is part of the Form-Associated Custom Element/ElementInternals spec. I makes the custom element the input element.