onFlush

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Add callbacks for Shiny session events

These functions are for registering callbacks on Shiny session events. onFlush registers a function that will be called before Shiny flushes the reactive system. onFlushed registers a function that will be called after Shiny flushes the reactive system. onSessionEnded registers a function to be called after the client has disconnected.

Usage
onFlush(fun, once = TRUE, session = getDefaultReactiveDomain())
onFlushed(fun, once = TRUE, session = getDefaultReactiveDomain())
onSessionEnded(fun, session = getDefaultReactiveDomain())
Arguments
fun
A callback function.
once
Should the function be run once, and then cleared, or should it re-run each time the event occurs. (Only for onFlush and onFlushed.)
session
A shiny session object.
Details

These functions should be called within the application's server function.

All of these functions return a function which can be called with no arguments to cancel the registration.

Aliases
  • onFlush
  • onFlushed
  • onSessionEnded
Documentation reproduced from package shiny, version 0.14.2, License: GPL-3 | file LICENSE

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