[combo-box] Show total and filtered items counter in dropdown

[knoobie]

Describe your motivation

In the past (v8) combo-box had the feature to show the amount of items in the drop-down and the current page the user is currently at - like 21-30 / 80. This feature was highly sought after and a lot of users are missing this nice guidance on our migrated apps.

Describe the solution you'd like

An API to toggle this kind of functionality. This could be implemented with both lazy- and in memory loading as the amount of items should always be known by the web-component.

[rolfsmeds]

What is the benefit to the user in this case, keeping in mind that the v10+ combo-box is a non-paged infinite-scrolling list, where the scrollbar handle gives you a visual indication of where you are? I also don't think there's any way to make this screen reader friendly.

[knoobie]

Tbh. I'm not entirely sure myself - our user base is quite diverse (ranging from 18 to 80 year old). This request was from the older generation that was probably just "used to it" over the years and is now wondering "where are my other items to select".

Additionally; I think it could be interesting to show the total amount and filtered amount of items as nice UX.

About accessibility.. it could probably done with aria-live combined with the drop-down having an aria-describedby or aria-controls.

[rolfsmeds]

That would be doable, and a11y would probably not be an issue as suggested. I was thinking of a dynamically updating indicator saying "you are at items 30-45 out of 200" type of thing, corresponding to the V8 version, which would hardly be feasible with the new component.

Mind if I rephrase the title of this issue to be about total and filtered item count instead?

[knoobie]

Any change to the ticket to improve the likelihood that the feature could be implemented is highly appreciated :)