How to implement a collapsible panel collapsed by default ?

[seedydocloop]

Summary

Hey everyone 👋

I'm having trouble implementing some state and rendering logic around a panel which would be collapsed by default.

I'd need a prop which would trigger rerender whenever panel collapsed state changes.

In the same time, I would need to keep the previous size value of my panel, so that triggering an "expand" would expand it back to its default value.

[bvaughn]

What have you tried?