[Feature Request]: Add onWillPresent Callback

[szheleshchenko]

What’s missing?

Right now, there’s only an onPresent callback, which fires after the sheet is fully presented. It’d be super useful to have an onWillPresent callback that triggers when the animation starts.

Why is this useful?

• Helps sync UI updates or animations with the sheet appearing.
• Lets us prepare content before the sheet is fully visible.

How could it work?

Something like this:

<TrueSheet onWillPresent={() => console.log('Sheet is about to show!')} />

[lodev09]

I actually thought about this before but it was not needed since you could just do it right before you present the sheet.

// Do your thing here.
await sheetRef.current?.present()

But I guess it does make sense since it has onPresent event. Might be also helpful when presenting the sheet via name prop.

Moving this to Discussions.

[lodev09]

I took a look at this and unfortunately it's very unreliable. There's no easy way to determine if the user is going to "dismiss" the sheet while dragging so we still going to end up with onDismiss. Although we can tell when it is being dismissed programmatically. However, you could still run your code before calling sheetRef.current?.dismiss() method so I don't think a dedicated event will help.

I'm open to suggestions though. Closing for now.