Support Controlled Tabs

[sam-chuang]

Is your feature request related to a problem? Please describe.
I need to know which tab is active, so I can do something(fetch data for instance) when tab is in active state

Describe the solution you'd like
If tabs support the controlled state, I guess I can use the selectedId to know which tab is active

Describe alternatives you've considered

1. provide context store that I can get selectedId and use it to know which tab is active
2. provide a hook that returns whether tabId is active or not

[jxom]

Hey, sorry about the late reply. Ideally, it would be nice to create a pattern like Tabs.State or Tabs.useState just like we do for our Modals so you can choose to control the state. I'll need to add this in. I think it would also be nice to add a prop to defer mounting of a tab panel until the tab is clicked too, which may be a nicer solution to fetch data for a particular tab.

[sam-chuang]

Thanks!! those will be very helpful features!!