Recent questions tagged Angular

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angular - Firestore: Add Custom Object to db

Good Morning, I tried adding a new created object from this class: export class Sponsor implements ISponsor { title: ... can I solve this issue? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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angular - How to identify which item in FormArray emitted valueChanges event?

In Angular, is there a way to identify which FormGroup/FormControl in a dynamicFormArray emitted the valueChanges event? ... each control. } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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angular - How to get access of the state tree in effects? (@ngrx/effects 2.x)

I am updating @ngrx/effects from 1.x to 2.x In 1.x I have access of state tree in effect: constructor(private ... ({ type: ActionTypes.BAR })); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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angular - Set null as empty string value for input field

I have an input field mapped to an entity in my controller with a ngModel 2-way binding: <input type=" ... be changed to null automatically? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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angular - How do I re-render a component manually?

I'm a newcomer to Angular2, I'm used to the Angular 1 digest cycle, meaning if I update the scope of a ... do I manually reload the component? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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angular - Ng-repeat-start in angular2 - aka repeat multiple elements using NgFor

I need to repeat several li-elements in a list in Angular2 for each item. In angular 1.x I used ng-repeat-start ... musikstykker</a></li> </ul> See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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angular - Observable forkJoin not firing

I'm trying to use forkJoin on two Observables. One of them starts as a stream... If I subscribe to them ... the console Array[9] Array[6] See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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angular - RxJS distinctUntilChanged - object comparison

I have a stream of objects and I need to compare if the current object is not the same as the previous and in this ... ": false } }); } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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angular - Can't bind to 'disabled' since it isn't a known property of 'li'

I added [disabled] property to li element. But I get this error: Can't bind to 'disabled' since it isn't a known ... > </li> Can anyone help me? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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angular - Delete Field in Firestore Document

how to delete a Document Field in Cloud Firestore? ... I'm using the code below but I can not. this.db.doc(` ... )}) Anyone know how to do it? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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angular - NgRX effects - Type 'Observable<unknown>' is not assignable to type 'Observable<Action>'

While working with NgRX 8 my colleagues and me are frequently facing a weird error message when implementing the ... down the error message. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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angular - How to add Validation pattern not to allow only space in input Angular2?

I used formBuilder in Angular2 and want to add validation pattern for not to allow "only spaces" in input. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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angular - Angular2 global service provider

/app - app.component.ts - app.component.html (hide/show: menu bar) - app.global.service.ts (Public ... that Injectable service is singleton. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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angular - components communication through <router-outlet>

I have a root component that has a changing boolean and I want to subscribe to that changing boolean, with a ... that needs to be read } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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angular - What are projectable nodes in angular2

On reading the documentation of ViewContainerRef and ComponentFactory, where , for example we have the method ... of their usage. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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angular - How can I programmatically pass parameters to an auxiliary route in angular2+?

Using angular2, I want to open an auxiliary route programmatically in my component. This code opens the route with the 'list ... : 'list' } }]); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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angular - Ionic 4 - how to pass data between pages using navCtrl or Router service

In Ionic 3 you could use the second argument of the navController to pass data to the next page and ... documentation and increases complexity. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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angular - Do I need to complete a Subject for it to be garbage collected?

I follow a cleanup pattern in my Angular components that looks like this: class SomeComponent implements OnInit, ... parent class is collected? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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angular - Angular4: Http -> HttpClient - requestOptions

So, I am trying to migrate from 'old' http to the new httpClient with the http client I am using this ... but getting a type missmatch :( See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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angular - How to implement chart.js in Angular2

I'm using Angular2-rc4 with angular-cli webpack and would like to implement a chart.js library. I've installed ... . What am I doing wrong? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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angular - Type 'Headers' has no properties in common with type 'RequestOptionsArgs'?

I just made two important upgrades to our Angular 4 application and build tools: @angular/core ^4.1.3 => ... ?: ResponseContentType | null; } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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angular - Angular2, how to clear URL query params on router navigate

I am struggling with clearing out URL params during nav in Angular 2.4.2. I have tried attaching every ... result should be /section/page1 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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angular - Error: No provider for t

I am trying to compile my angular code to production mode via ng build --prod and its successful but in browser I get the ... ": "2.4.2" } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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angular - Open new window in new tab

I am trying to open a new window when user click on button as follows: protected assignActity(type: string): void ... it to get it working? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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angular - Loading modules from different server at runtime

Is it somehow possible to load different modules in my angular 2 app runtime, from different servers and if so, ... , project, hosting, enz. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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angular - Dynamically adding components in ngFor

I have a "dashboard" that loads configured elements. Dashboard template has this: <div class="dash-container" [ngGrid ... id}}) in my component? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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816 views

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angular - How to declare a directive globally for all modules?

I'm developing a Github repo which follows the offical tutorial of Angular (Tour of Heroes). You can see all the ... repo, if you need it. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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angular - No provider for TemplateRef! (NgIf ->TemplateRef)

I'm trying to show a checkmark if an answer is the accepted answer: template: `<div ngIf="answer.accepted">&#10004 ... ) What am I doing wrong? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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