ui.a11y progressbar enhancement

[disic]

Feature: Add the opportunity to create custom attributs on the handle.

For examples :

• if I want to add attribut aria-labelledby, there is no option to easily add it.
• if a region is updated by the progress bar, there is no way to connect.
• as the slider and the update of the aria-valuenow attributes, it would be necessary to update a new aria-valuetext attribute that contains the aria-valuenow attribute with a prefix and a suffix

[Scott González]

Progressbar doesn't have handles. Are you referring to sliders? I'm going to close this ticket. Please create a new ticket that only talks about one widget and provide clear examples and why new APIs are necessary rather than having the user perform the actions on their own.