St.expander events/callbacks?

Using Streamlit
1

Hello,

Is there a way to track the state of an expander? The “expanded” attribute is a good control point, but I would like an event/callback to signal when the user collapsed the expander. Can’t see anything in the docs.

Many Thanks,
David.

2

Hi @dave51c,

Thanks for sharing your question. There isn’t a built-in event that fires when the expander is collapsed by the user. Feel free to open a feature request here.

Caroline

3

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