onError property
A callback for error reporting if one of the listeners added with addListener throws.
This callback should not throw.
It exists for error reporting (mainly FlutterError.onError
), and
should not be used otherwise.
If you need an error status, consider adding an error property on
your custom state.
If no onError is specified, fallbacks to Zone.current.handleUncaughtError
.
Implementation
ErrorListener? onError;