RunHandler typedef
- Zone self,
- ZoneDelegate parent,
- Zone zone,
- R f( )
The type of a custom Zone.run implementation function.
Receives the Zone that the handler was registered on as self
, a delegate forwarding to the handlers of self
's parent zone as parent
, and the current zone where the error was uncaught as zone
, which will have self
as a parent zone.
The function f
is the function which was passed to the Zone.run of zone
.
The default behavior of Zone.run is to call f
in the current zone, zone
. A custom handler can do things before, after or instead of calling f
.
Implementation
typedef RunHandler = R Function<R>( Zone self, ZoneDelegate parent, Zone zone, R Function() f);
© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dart.dev/stable/2.13.0/dart-async/RunHandler.html