Multiple selected problem

[sebilasse]

Please see this fork
https://github.com/sebilasse/adding-class

I tried to extract the logic of the Accordion I am building to match this example.
While App.ts/App (in the fork) is working fine with exclusive: true it does not work with exclusive: false (meaning there can be multiple .active panels and so this._activeId is an array).

[sebilasse]

It is working if I make this._activeId always an array ...