VisibilityDetector does not allow to set updateTime about flutter.widgets

[jamesderlin]

There is no variable named updateTime. Do you mean VisibilityDetectorController.updateInterval? That is already configurable and documented.

[jamesderlin]

BTW, while 500ms might be too long for your liking, I would not recommend setting updateInterval to Duration.zero to get updates on every frame, particularly for cases where the user scrolls quickly. Doing that could inundate you with callbacks, and even if a chat message was visible for a single frame, it is unlikely that the user could have actually read it in 1/60th of a second.

[mishatron]

There is no variable named updateTime. Do you mean VisibilityDetectorController.updateInterval? That is already configurable and documented.

I fixed variable name. so for what is recommended to use Duration.zero?

[jamesderlin]

You're free to set updateInterval to Duration.zero if you really want visibility callbacks to fire on every frame. It's useful for tests. I just don't personally recommend using that value in a production app since I think it would be overkill, would be too noisy, and wouldn't offer much benefit over using a small but non-zero Duration.