Decide which attributes to copy from the <input> to the <button>

[romaricpascal]

What

Decide which of the attributes of the <input> field need copying or move to the <button>.

Why

Some attributes like aria-describedby carry information for assistive technologies or may be used for other purposes. We need to decide which of these we'd want to copy/move to the button.

Who needs to work on this

Developers

Who needs to review this

Developers

Done when

• We have a list of attributes that should be copied to the button when the field is enhanced

and/or

• We have an API to make this list configurable

[romaricpascal]

We'll only copy aria-describedby used to associate the hints and errors, and the id to allow proper linking from the Error Summary. Other attributes can be copied by the service code once the component is initialised.