In what scenarios do you need this feature?

I create an excalidraw plugin for display excalidraw file in a tab. But when close the tab, error occured.

I need to run root.unmount() before the element of content destroyed. Thx

Describe the optimal solution

Add an option in this.addTab(options)，

// run this code before
addTab({
/// ...
  beforeDestroy() {
    // unmount your app
  }
)}

Describe the candidate solution

No response

Other information

No response