Delay on_change event

[bobweasel]

Question

Is there a way to delay the on_change event of an input field from running until, eg 2 seconds after the changes? ie wait 2 seconds for no changes then the event runs?

[falkoschindler]

Hi @bobweasel,

For generic events there is a throttle parameter which you can use:

ui.input().on('update:modelValue', lambda e: ui.notify(e.args), throttle=2.0, leading_events=False)

The argument leading_events=False defines that there should be no immediate event, but only after the throttle delay has passed. Have a look at https://nicegui.io/documentation/slider#throttle_events_with_leading_and_trailing_options for an interactive demo.

Unfortunately there are no such options for specific events like .on_value_change(...), and I don't see an easy way to change that.