我想将一个函数传递给类构造函数。该函数最终将在 onBlur 侦听器中使用。有些东西不工作。(FWIW,此代码正在“then”函数中执行 HttpRequest.getString())
这有效:
query("${_element_id}_input").onBlur.listen((e) {
InputElement species_id = query("#id_species_id");
species_id.value = value;
print(species_id.value);
});
如果我将其替换为以下内容,则会出现错误:
onBlur = ((e) {
InputElement species_id = query("#id_species_id");
species_id.value = value;
print(species_id.value);
});
if (onBlur != null) {
query("#{_element_id}_input").onBlur.listen(onBlur);
}
如果我命名函数,我会得到同样的错误。错误是:
Uncaught Error: SyntaxError: Internal Dartium Exception
Stack Trace:
#0 Document.query (file:///mnt/data/b/build/slave/dartium-lucid32-full-trunk/build/src/out/Release/gen/blink/bindings/dart/dart/html/Document.dart:123:128)
#1 query (dart:html:448:49)
#2 AutoComplete.AutoComplete.<anonymous closure> (package:canopy/auto_complete.dart:69:14)
#3 _ThenFuture._zonedSendValue (dart:async/future_impl.dart:371:24)
#4 _TransformFuture._sendValue.<anonymous closure> (dart:async/future_impl.dart:348:48)
#5 _ZoneBase._runInZone (dart:async/zone.dart:74:15)
#6 _ZoneBase._runUnguarded (dart:async/zone.dart:102:22)
#7 _ZoneBase.executeCallback (dart:async/zone.dart:58:23)
#8 _TransformFuture._sendValue (dart:async/future_impl.dart:348:26)
#9 _FutureImpl._setValueUnchecked (dart:async/future_impl.dart:184:26)
#10 _FutureImpl._setValue (dart:async/future_impl.dart:174:23)
#11 _FutureImpl._setOrChainValue (dart:async/future_impl.dart:336:16)
#12 _ThenFuture._zonedSendValue (dart:async/future_impl.dart:377:21)
#13 _TransformFuture._sendValue.<anonymous closure> (dart:async/future_impl.dart:348:48)
#14 _ZoneBase._runInZone (dart:async/zone.dart:82:17)
#15 _ZoneBase._runUnguarded (dart:async/zone.dart:102:22)
#16 _ZoneBase.executeCallback (dart:async/zone.dart:58:23)
#17 _TransformFuture._sendValue (dart:async/future_impl.dart:348:26)
#18 _FutureImpl._setValueUnchecked (dart:async/future_impl.dart:184:26)
#19 _FutureImpl._asyncSetValue.<anonymous closure> (dart:async/future_impl.dart:218:25)
#20 _asyncRunCallback (dart:async/event_loop.dart:9:15)
#21 _createTimer.<anonymous closure> (dart:async-patch/timer_patch.dart:8:13)
#22 _Timer._Timer.<anonymous closure> (file:///mnt/data/b/build/slave/dartium-lucid32-full-trunk/build/src/dart/tools/dom/src/native_DOMImplementation.dart:255:17)
Exception: SyntaxError: Internal Dartium Exception
_DefaultZone.handleUncaughtError.<anonymous closure> (dart:async/zone.dart:146:7)
_asyncRunCallback (dart:async/event_loop.dart:9:15)
_asyncRunCallback (dart:async/event_loop.dart:13:7)
_createTimer.<anonymous closure> (dart:async-patch/timer_patch.dart:8:13)
_Timer._Timer.<anonymous closure> (file:///mnt/data/b/build/slave/dartium-lucid32-full-trunk/build/src/dart/tools/dom/src/native_DOMImplementation.dart:255:17)