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$dragProgress is undefined

See original GitHub issue

Hello,

I have an issue with subscribing to .dragProgress$. It returns undefined.

I am using 3.0.0-beta.9 because I had an issue with embeding in material tabs not taking ‘size’ property.

My code is :

@ViewChildren("graphSplit") graphSplit: SplitComponent;

ngAfterViewInit(): void {
    console.log("This is called");
    console.log(this.graphSplit); // NOT NULL
    console.log(this.graphSplit.dragProgress$); // NULL
    
    this.graphSplit.dragProgress$.subscribe(() => {
      console.log("hi");
    });
  }

I have tried what you said here : https://stackblitz.com/edit/angular-duzjbv?file=src%2Fapp%2Fapp.component.ts

But it stills says undefined. Here’s the stack :

ERROR TypeError: this.graphSplit.dragProgress$ is undefined
Stack trace:
./src/app/programs-zone/programs-zone.component.ts/ProgramsZoneComponent.prototype.ngAfterViewInit@http://localhost:4200/main.js:3170:9
callProviderLifecycles@http://localhost:4200/vendor.js:64089:9
callElementProvidersLifecycles@http://localhost:4200/vendor.js:64063:13
callLifecycleHooksChildrenFirst@http://localhost:4200/vendor.js:64053:29
checkAndUpdateView@http://localhost:4200/vendor.js:64989:5
callViewAction@http://localhost:4200/vendor.js:65221:21
execComponentViewsAction@http://localhost:4200/vendor.js:65163:13
checkAndUpdateView@http://localhost:4200/vendor.js:64986:5
callWithDebugContext@http://localhost:4200/vendor.js:65873:22
debugCheckAndUpdateView@http://localhost:4200/vendor.js:65551:12
./node_modules/@angular/core/fesm5/core.js/ViewRef_.prototype.detectChanges@http://localhost:4200/vendor.js:63367:13
./node_modules/@angular/core/fesm5/core.js/ApplicationRef.prototype.tick/<@http://localhost:4200/vendor.js:59100:58
./node_modules/@angular/core/fesm5/core.js/ApplicationRef.prototype.tick@http://localhost:4200/vendor.js:59100:13
./node_modules/@angular/core/fesm5/core.js/ApplicationRef.prototype._loadComponent@http://localhost:4200/vendor.js:59134:9
./node_modules/@angular/core/fesm5/core.js/ApplicationRef.prototype.bootstrap@http://localhost:4200/vendor.js:59076:9
./node_modules/@angular/core/fesm5/core.js/PlatformRef.prototype._moduleDoBootstrap/<@http://localhost:4200/vendor.js:58879:74
./node_modules/@angular/core/fesm5/core.js/PlatformRef.prototype._moduleDoBootstrap@http://localhost:4200/vendor.js:58879:13
./node_modules/@angular/core/fesm5/core.js/PlatformRef.prototype.bootstrapModuleFactory/</</<@http://localhost:4200/vendor.js:58845:21
./node_modules/zone.js/dist/zone.js/</ZoneDelegate.prototype.invoke@http://localhost:4200/polyfills.js:8521:17
onInvoke@http://localhost:4200/vendor.js:58349:24
./node_modules/zone.js/dist/zone.js/</ZoneDelegate.prototype.invoke@http://localhost:4200/polyfills.js:8520:37
./node_modules/zone.js/dist/zone.js/</Zone.prototype.run@http://localhost:4200/polyfills.js:8280:24
scheduleResolveOrReject/<@http://localhost:4200/polyfills.js:9019:29
./node_modules/zone.js/dist/zone.js/</ZoneDelegate.prototype.invokeTask@http://localhost:4200/polyfills.js:8553:17
onInvokeTask@http://localhost:4200/vendor.js:58340:24
./node_modules/zone.js/dist/zone.js/</ZoneDelegate.prototype.invokeTask@http://localhost:4200/polyfills.js:8552:41
./node_modules/zone.js/dist/zone.js/</Zone.prototype.runTask@http://localhost:4200/polyfills.js:8325:28
drainMicroTaskQueue@http://localhost:4200/polyfills.js:8731:25
./node_modules/zone.js/dist/zone.js/</ZoneDelegate.prototype.invoke@http://localhost:4200/polyfills.js:8521:17
onInvoke@http://localhost:4200/vendor.js:58349:24
./node_modules/zone.js/dist/zone.js/</ZoneDelegate.prototype.invoke@http://localhost:4200/polyfills.js:8520:37
./node_modules/zone.js/dist/zone.js/</Zone.prototype.run@http://localhost:4200/polyfills.js:8280:24
./node_modules/zone.js/dist/zone.js/</</</<@http://localhost:4200/polyfills.js:11252:24
patchMethod/proto[name]@http://localhost:4200/polyfills.js:9699:24
load@http://localhost:4200/main.js:2358:25
./node_modules/highcharts/highcharts.js/</</a.fireEvent/<@http://localhost:4200/vendor.js:123352:268
./node_modules/highcharts/highcharts.js/</</a.fireEvent@http://localhost:4200/vendor.js:123352:68
onload@http://localhost:4200/vendor.js:123608:50
firstRender@http://localhost:4200/vendor.js:123607:457
init/<@http://localhost:4200/vendor.js:123581:369
./node_modules/highcharts/highcharts.js/</</a.fireEvent@http://localhost:4200/vendor.js:123352:326
init@http://localhost:4200/vendor.js:123580:131
getArgs@http://localhost:4200/vendor.js:123580:51
./node_modules/highcharts/highcharts.js/</</a.Chart@http://localhost:4200/vendor.js:123579:347
./node_modules/highcharts/highcharts.js/</</a.chart@http://localhost:4200/vendor.js:123579:414
./node_modules/highcharts-angular/fesm5/highcharts-angular.js/HighchartsChartComponent.prototype.updateOrCreateChart@http://localhost:4200/vendor.js:123236:45
./node_modules/highcharts-angular/fesm5/highcharts-angular.js/HighchartsChartComponent.prototype.wrappedUpdateOrCreateChart@http://localhost:4200/vendor.js:123222:13
set@http://localhost:4200/vendor.js:123188:13
updateProp@http://localhost:4200/vendor.js:63978:5
checkAndUpdateDirectiveInline@http://localhost:4200/vendor.js:63737:19
checkAndUpdateNodeInline@http://localhost:4200/vendor.js:65036:20
checkAndUpdateNode@http://localhost:4200/vendor.js:64998:16
debugCheckAndUpdateNode@http://localhost:4200/vendor.js:65631:19
debugCheckDirectivesFn@http://localhost:4200/vendor.js:65591:13
View_GraphZoneComponent_0/<@ng:///AppModule/GraphZoneComponent.ngfactory.js:17:5
debugUpdateDirectives@http://localhost:4200/vendor.js:65583:12
checkAndUpdateView@http://localhost:4200/vendor.js:64980:5
callViewAction@http://localhost:4200/vendor.js:65221:21
execComponentViewsAction@http://localhost:4200/vendor.js:65163:13
checkAndUpdateView@http://localhost:4200/vendor.js:64986:5
callViewAction@http://localhost:4200/vendor.js:65221:21
execEmbeddedViewsAction@http://localhost:4200/vendor.js:65184:17
checkAndUpdateView@http://localhost:4200/vendor.js:64981:5
callViewAction@http://localhost:4200/vendor.js:65221:21
execComponentViewsAction@http://localhost:4200/vendor.js:65163:13
checkAndUpdateView@http://localhost:4200/vendor.js:64986:5
callViewAction@http://localhost:4200/vendor.js:65221:21
execComponentViewsAction@http://localhost:4200/vendor.js:65163:13
checkAndUpdateView@http://localhost:4200/vendor.js:64986:5
callWithDebugContext@http://localhost:4200/vendor.js:65873:22
debugCheckAndUpdateView@http://localhost:4200/vendor.js:65551:12
./node_modules/@angular/core/fesm5/core.js/ViewRef_.prototype.detectChanges@http://localhost:4200/vendor.js:63367:13
./node_modules/@angular/core/fesm5/core.js/ApplicationRef.prototype.tick/<@http://localhost:4200/vendor.js:59100:58
./node_modules/@angular/core/fesm5/core.js/ApplicationRef.prototype.tick@http://localhost:4200/vendor.js:59100:13
next/<@http://localhost:4200/vendor.js:58991:99
./node_modules/zone.js/dist/zone.js/</ZoneDelegate.prototype.invoke@http://localhost:4200/polyfills.js:8521:17
onInvoke@http://localhost:4200/vendor.js:58349:24
./node_modules/zone.js/dist/zone.js/</ZoneDelegate.prototype.invoke@http://localhost:4200/polyfills.js:8520:37
./node_modules/zone.js/dist/zone.js/</Zone.prototype.run@http://localhost:4200/polyfills.js:8280:24
./node_modules/@angular/core/fesm5/core.js/NgZone.prototype.run@http://localhost:4200/vendor.js:58263:16
next@http://localhost:4200/vendor.js:58991:69
./node_modules/@angular/core/fesm5/core.js/EventEmitter.prototype.subscribe/schedulerFn<@http://localhost:4200/vendor.js:58080:36
./node_modules/rxjs/_esm5/internal/Subscriber.js/SafeSubscriber.prototype.__tryOrUnsub@http://localhost:4200/vendor.js:126156:13
./node_modules/rxjs/_esm5/internal/Subscriber.js/SafeSubscriber.prototype.next@http://localhost:4200/vendor.js:126094:17
./node_modules/rxjs/_esm5/internal/Subscriber.js/Subscriber.prototype._next@http://localhost:4200/vendor.js:126038:9
./node_modules/rxjs/_esm5/internal/Subscriber.js/Subscriber.prototype.next@http://localhost:4200/vendor.js:126015:13
./node_modules/rxjs/_esm5/internal/Subject.js/Subject.prototype.next@http://localhost:4200/vendor.js:125781:17
./node_modules/@angular/core/fesm5/core.js/EventEmitter.prototype.emit@http://localhost:4200/vendor.js:58064:54
checkStable@http://localhost:4200/vendor.js:58318:13
onLeave@http://localhost:4200/vendor.js:58385:5
onInvokeTask@http://localhost:4200/vendor.js:58343:17
./node_modules/zone.js/dist/zone.js/</ZoneDelegate.prototype.invokeTask@http://localhost:4200/polyfills.js:8552:41
./node_modules/zone.js/dist/zone.js/</Zone.prototype.runTask@http://localhost:4200/polyfills.js:8325:28
./node_modules/zone.js/dist/zone.js/</ZoneTask.invokeTask@http://localhost:4200/polyfills.js:8628:24
invokeTask@http://localhost:4200/polyfills.js:9874:9
globalZoneAwareCallback@http://localhost:4200/polyfills.js:9911:21
 AppComponent.html:5:4

Issue Analytics

  • State:closed
  • Created 4 years ago
  • Comments:6 (3 by maintainers)

github_iconTop GitHub Comments

1reaction
Yohandahcommented, Apr 10, 2019

oops, sorry I’m new to Angular. Thanks for your help.

keep up the good work 😃

1reaction
bertrandgcommented, Apr 10, 2019

Hi, You use ViewChildren (which return an array) instead of ViewChild which only returns one instance! 😉

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