mteb/FreshStackRetrieval huggingface dataset:
Angular is failing to compile because of the following error and I'm really confused as to why.
error TS2322: Type 'string' is not assignable to type 'MenuItem'.

4     <menu-item item={{item}}></menu-item>
                 ~~~~

  apps/angular-monorepo/src/app/app.component.ts:10:16
    10   templateUrl: './app.component.html',
                      ~~~~~~~~~~~~~~~~~~~~~~
    Error occurs in the template of component AppComponent.

Why is it complaining that item is of type 'string' when I specified that item is of type MenuItem or undefined
@Component({
  standalone: true,
  imports: [NxWelcomeComponent, RouterModule, MenuItemComponent],
  selector: 'angular-monorepo-root',
  templateUrl: './app.component.html',
  styleUrl: './app.component.scss',
})
export class AppComponent {
  title = 'angular-monorepo';
  menu: MenuItem[] = [
    {id: 101,category: 'appetizer', name:'french toast', price: 10.00},
    {id: 201,category: 'entree',sub_category:"rice",name:'pork', price: 10.00},
    {id: 301,category: 'drinks',name:'tea', price: 10.00},
    {id: 401,category: 'dessert',name:'affogato', price: 10.00},
  ]
}
//app.component.html
<router-outlet></router-outlet>
<h1>POS</h1>
@for (item of menu; track item.id) {
    <menu-item item={{item}}></menu-item>
}



@Component({
  selector: 'menu-item',
  standalone: true,
  imports: [CommonModule],
  templateUrl: './menu-item.component.html',
  styleUrl: './menu-item.component.scss',
})
export class MenuItemComponent {
  constructor() {

  }
  @Input({required: true}) item: MenuItem | undefined = undefined;
  
  @Output() itemSelectedEvent = new EventEmitter<number>();
}

//menu-item.component.html
@if (item) {
    <p>{{item.name}}</p>
}


//menu-item.type.ts
export type MenuItem = {
    id: number,
    category: ItemCategory,
    sub_category?: string,
    name: string,
    price: number
  }

I expect item would be of type MenuItem like I specified
Example:
https://stackblitz.com/edit/myxj6y?file=src%2Fexample%2Fsnack-bar-overview-example.ts
I tried the class in styles.scss, with ng-deep, overriding the component's root class and it still doesn't work. I'm not using standalone components. What is wrong with the code ?
"@angular/material": "^16.2.9",
"@angular/common": "^16.2.0",
I have updated my Angular app to version 16 and now in older browsers I am getting the error which says "SyntaxError: private fields are not currently supported."
I am trying to use polyfills to support modern browser features in the older browsers.
Here is the polyfills.ts file:
import 'core-js';
import 'core-js/stable';
import 'regenerator-runtime/runtime';

import 'zone.js';

This is the tsconfig.json
"compilerOptions": {
    "target": "es2015"
  },

This is the error on Firefox (v75):
after migrating to new angular 17 and updating my template, ng serve throws this message
NG5002: Cannot parse expression. @for loop expression must match the pattern " of
"
I'm using Angular material's AutoComplete as follows
    <form class="form">
        <mat-form-field class="search-user">
            <mat-label>User</mat-label>
            <input type="text" matInput [formControl]="userCtrl" [matAutocomplete]="auto">
            <mat-autocomplete #auto="matAutocomplete" [displayWith]="displayFn">
                @if(userCtrl.value?.length < 3) { 
                    <div class>Type 3 or more characters</div>
                } @else if(isLoading) {
                    <div>loading...</div>
                } @else if (!(filteredOptions | async)?.length) {
                    <div class>No match found</div>
                }
                @for (option of filteredOptions | async; track option) {
                    <mat-option [value]="option">{{option}}</mat-option>
                    }
            </mat-autocomplete>
        </mat-form-field>
    </form>

This is more or less a copy-past from one of their examples.
But what I would like to add is text above the options (inside the overlay) if there are no options (yet)
@if(userCtrl.value?.length < 3) { 
    <div class>Type 3 or more characters</div>
} @else if(isLoading) {
    <div>loading...</div>
} @else if (!(filteredOptions | async)?.length) {
    <div class>No match found</div>
}

However, the overlay is closed when there are 0 options. Is there a way, such that I can show/activate the overlay when the input has focus and 0 options (empty array)? But when the user select an options, the focus is lost and the overlay closes
DEMO
I'm developing a solution Angular 16 Material using the free theme Matero.
I started from the downloadable demo so Angular Core ^16.2.7 etc.(https://github.com/ng-matero/ng-matero/blob/main/package.json), deleting the unuseful demo parts.
I'm facing a problem with subscribing after a http call, i need to declare
@Component({
  ...
  changeDetection: ChangeDetectionStrategy.OnPush,
})

in the constructor
export class LoginComponent {
  isSubmitting = false;
  ...
  constructor(
    ...
    private ref: ChangeDetectorRef,
  ) {}

and finally after a call for example a login
    this.isSubmitting = true;
    this.auth
      .login(this.username.value, this.password.value, this.rememberMe.value)
      .pipe(filter(authenticated => authenticated))
      .subscribe({
        next: () => {
            this.isSubmitting = false; 
            this.ref.markForCheck();
        },

in the html for example a button
<button class="w-full m-y-16" mat-raised-button color="primary"
        [loading]="isSubmitting"
        (click)="login()">{{'login' | translate}}</button>

With the previous code, pratically it should happens nothing (there is no router redirection) but by clicking the button the spinner inside the button should cease to spin and appear back the "Login" text.
But this happens because the "this.ref.markForCheck();" otherwise without this call it ignores the change of isSubmitting and the spinner remain here.
The same for an http call ( normal call with HttpClient that returns an Observable) with binding to a mtx-grid, the binding succeed only by calling "this.ref.markForCheck();" in the "subscribe".
Angular CLI is 16.2.10
What i'm doing in a wrong manner ?
The first step
    ng add @angular-eslint/schematics

executes successfully but the second step
    ng g @angular-eslint/schematics:convert-tslint-to-eslint

produces this error:
    Error: The `convert-tslint-to-eslint` schematic is no longer supported.

    Please see https://github.com/angular-eslint/angular-eslint/blob/main/docs/MIGRATING_FROM_TSLINT.md

and the readme document referenced in the error message is the one I was following to attempt this migration.
I successfully used this schematic about about three weeks ago.
Has anyone else encountered this error message? Know of a workaround?
Angular CLI: 17.0.7
Node: 18.13.0
Package Manager: npm 8.19.3
OS: darwin x64

Angular: 17.0.7
... animations, cli, common, compiler, compiler-cli, core, forms
... language-service, localize, platform-browser
... platform-browser-dynamic, router

Package                         Version
---------------------------------------------------------
@angular-devkit/architect       0.1700.7
@angular-devkit/build-angular   17.0.7
@angular-devkit/core            17.0.7
@angular-devkit/schematics      17.0.7
@schematics/angular             17.0.7
rxjs                            7.8.1
typescript                      5.2.2
zone.js                         0.14.2
I have an Angular 17 application which uses standalone components, the initial routes are set up like so in app.routes.ts
export const appRoutes: Array<Route> = [
  { path: '', redirectTo: '/dashboard', pathMatch: 'full' },
  {
    path: 'login',
    component: LoginComponent,
    title: 'Login',
  },
  {
    path: '',
    canActivateChild: [AuthGuard],
    loadChildren: () => import(`./app-authorized.routes`).then((r) => r.appAuthorizedRoutes),
  },
  { path: '**', redirectTo: '/dashboard' },
];

Once the user logs in they are authorized and redirected to /dashboard, and the app-authorized.routes.ts routes are loaded. Here is what that file looks like:
export const appAuthorizedRoutes: Array<Route> = [
  {
    path: 'dashboard',
    component: DashboardComponent,
    canActivate: [AuthGuard],
    title: 'Dashboard',
  },
  {
    path: 'settings',
    component: SettingsComponent,
    canActivate: [AuthGuard],
    title: 'Settings',
  },
  //etc...
];

An issue I have is that after logging in, there is a delay as the data loads and the UI looks strange.  I have a navigation bar set to appear when authorized, which shows but the login component is also still showing - which is wrong.
After logging in and while the lazy-loaded chunks are loading, is there a way to display this progress in the UI somehow?
I have an Angular 17 application using standalone components, the initial routes are set up like so in app.routes.ts
export const appRoutes: Array<Route> = [
  { path: '', redirectTo: '/dashboard', pathMatch: 'full' },
  {
    path: 'login',
    component: LoginComponent,
    title: 'Login',
  },
  {
    path: '',
    canActivateChild: [AuthGuard],
    loadChildren: () => import(`./app-authorized.routes`).then((r) => r.appAuthorizedRoutes),
  },
  { path: '**', redirectTo: '/dashboard' },
];

Once the user logs in they are authorized and redirected to /dashboard, and the app-authorized.routes.ts routes are loaded. Here is what that file looks like:
export const appAuthorizedRoutes: Array<Route> = [
  {
    path: 'dashboard',
    component: DashboardComponent,
    canActivate: [AuthGuard],
    title: 'Dashboard',
  },
  {
    path: 'settings',
    component: SettingsComponent,
    canActivate: [AuthGuard],
    title: 'Settings',
  },
  //etc...
];

I have several services that can only be used once the user logs in, but currently upon inspecting the chunked files Angular loads, all of the services are loaded initially at the login page.  Of course this makes sense because they are decorated with
@Injectable({
  providedIn: 'root',
})

Modules of course would make this easy, but since I'm not using modules how do I tell my application to include only certain services along with the lazy-loaded routes, or just any way after the user logs in?
I am migrating old angular project to latest angular 17. I changed class based auth guard to functional auth guard. The problem I am having is that I get this error:
ERROR NullInjectorError: NullInjectorError: No provider for _UserService!
at NullInjector.get (core.mjs:5626:27)
at R3Injector.get (core.mjs:6069:33)
at R3Injector.get (core.mjs:6069:33)
at injectInjectorOnly (core.mjs:911:40)
at ɵɵinject (core.mjs:917:42)
at inject (core.mjs:1001:12)
at authGuard (auth.guard.ts:6:23)
at router.mjs:3323:134
at runInInjectionContext (core.mjs:6366:16)
at router.mjs:3323:89

Here is my authGuard code:
import {CanActivateFn, Router} from '@angular/router';
import {inject} from "@angular/core";
import {UserService} from "../users/user.service";

export const authGuard: CanActivateFn = (route, state) => {
  const userService = inject(UserService);
  const router = inject(Router);

  if (!userService.is_authenticated()) {
    router.navigate(['login', state.url]);
    return false;
  }
  return true;
};

Here is part of my UserService:
import {Injectable} from '@angular/core';
import { JwtHelperService } from '@auth0/angular-jwt';
import {HttpClient} from '@angular/common/http';

@Injectable()
export class UserService {
    private usersUrl = '/users/';

    constructor(private http: HttpClient,
                private jwtHelper: JwtHelperService) { }

    ...

    public is_authenticated(): boolean {
        const token = localStorage.getItem('token');
        // Check whether the token is expired and return
        // true or false
        return !this.jwtHelper.isTokenExpired(token);
    }
}

As I understand the documentation I don't need to provide UserService anywhere. Using 'inject' should be enough. What am I doing wrong?
I apologize in advance if i am asking too stupid questions but i am really new to angular and i do not understand how to handle a JSON object coming from the server and convert that object into a custom datatype so i can use that data to render on html using ngFor.
I have tried multiple things but nothing seems to work. Any help will be very much appreciated.
P.S. please excuse me for the extremely simple html page, application is coming up from scratch and i am working on functionalities and backend server connections before working on the designs.
Below is the Code and screenshots attached.
Employee.Component.html

<p>Inside Employee Component.</p>
<button type="submit" class="btn btn-login float-center" (click)="getAllEmployees1()">getAllEmployees</button>

<div>
    <h2>Employee List</h2>
     {{ employees }}
  </div>

employee.component.ts file

employees: any;

 constructor(private service: EmployeeServiceService){
  }
  ngOnInit(){

  }

  public getAllEmployees1(){
    this.service.getAllEmployees().subscribe((data)=>{

      this.employees = data;
      console.log("Response: "+ this.employees);
    },
    (error) =>{
      console.error('Error fetching employees: ', error);
    }
    );
  }

EmployeeService file:

@Injectable({
  providedIn: 'root'
})
export class EmployeeServiceService {

  constructor(private http:HttpClient) { }

  getAllEmployees(){
    console.log("Inside get ALL Employees Method.");
    return this.http.get("https://localhost:9090/employee/getAllEmployees",{responseType:'text' as 'json'});
  }

Employee class type:

export class AddEmployee{
    firstName: any;
    lastName: any;
    address:any;
    project:any
    ssn:any;
    joinDate:any;
    status:any

        constructor(
            firstName: string,
            lastName: string,
            address:string,
            project:string,
            ssn:number,
            joinDate:Date,
            status:number
        ){}
    }

I wanted to convert the JSON data coming from the server to AddEmployee type and then run a ngFor loop in the html so i can put everything in the tabular format.
But angular keeps on complaining that the data i am getting is in Object Format and ngFor can only be used on observables and iterators. Below is the image attached of how the object gets pulled from server and when i click on getAllEmployees button, it just renders the object itself. I am not able to print the data if i dont call {{ employees }} directly.
enter image description here
Error Page:
I want to create a dynamic form that is an array of payments, the user can add a new payment, delete from the array, and edit.
My HTML:
<form [formGroup]="createLoanPaymentsForm" (ngSubmit)="createLoan()">
    <ng-container formArrayName="createLoanPaymentsForm">
        @for (
            createLoanPaymentForm of createLoanPaymentsForm.controls; // here is the error
            track $index
        ) {
            <div [formGroup]="createLoanPaymentForm">
                <mat-form-field appearance="fill">
                    <input matInput formControlName="title" placeholder="Lesson title" />
                </mat-form-field>
            </div>
        }
        <button mat-mini-fab (click)="addPayment()">Add</button>
    </ng-container>
</form>

The configuration of my component:
@Component({
    selector: 'app-create-loan-dialog',
    standalone: true,
    imports: [
        MatInputModule,
        MatButtonModule,
        MatDialogTitle,
        MatDialogContent,
        MatDialogActions,
        MatDialogClose,
        ReactiveFormsModule,
        MatStepperModule,
    ],
    providers: [
        {
            provide: STEPPER_GLOBAL_OPTIONS,
            useValue: { showError: true },
        },
    ],
    templateUrl: './create-loan-dialog.component.html',
})

My FormGroup:
createLoanPaymentsForm: FormGroup = this.formBuilder.group({
    payments: this.formBuilder.array([]),
});

There is an error in my loop, it says:

Type '{ [key: string]: AbstractControl<any, any>; }' must have a 'Symbol.iterator' method that returns an iterator.

The solution for this bug, possible the correct configuration for a FormArray loop in Angular 17
I am learning Angular multiple content projection from new Angular 17 docs.
When I am using example from doc I am getting error:
profile.component.html::
<div class="red">
  <ng-content select="profile-header"></ng-content>
</div>

<div class="green">
  <ng-content></ng-content>
</div>

<div class="blue">
  <ng-content select="profile-footer"></ng-content>
</div>

In app.component.html::
<app-profile>
    <profile-header><h2>Header 1</h2></profile-header>
    <p>This is projected content</p>
</app-profile>

I am getting this error::
NG8001: 'profile-header' is not a known element:

How can I resolve it?
Following is my Standalone api calls containing  service:


import { Injectable} from '@angular/core';
import { ProductEndPoints } from '../../constants/apiConstants/product-endpoints';
import { HttpClient} from '@angular/common/http';
import { Observable } from 'rxjs';
import { environment } from 'src/environments/environment.development';
import { product } from '../../models/product.types';
@Injectable({
  providedIn: 'root',
})
export class ProductService {

  constructor(private http:HttpClient) { }

  getAllProducts():Observable<product[]>{
     return this.http.get<product[]>(environment.apiUrl+`${ProductEndPoints.getAllProduct}`)
  }

  getProductDetailById(id:string):Observable<product>{
    return this.http.get<product>(environment.apiUrl+`${ProductEndPoints}/${id}`)
  }
}



I also added this service to target component's providers array.
The error I got while injecting it to the standalone component is :
src_app_pages_Product_product-routing_ts.js:2 ERROR Error: Uncaught (in promise): NullInjectorError: R3InjectorError(Standalone[ProductListComponent])[HttpClient -> HttpClient -> HttpClient -> HttpClient]: 
  NullInjectorError: No provider for HttpClient!
NullInjectorError: R3InjectorError(Standalone[ProductListComponent])[HttpClient -> HttpClient -> HttpClient -> HttpClient]: 
  NullInjectorError: No provider for HttpClient!
    at NullInjector.get (core.mjs:8890:27)
    at R3Injector.get (core.mjs:9334:33)
    at R3Injector.get (core.mjs:9334:33)
    at R3Injector.get (core.mjs:9334:33)
    at R3Injector.get (core.mjs:9334:33)
    at ChainedInjector.get (core.mjs:14018:36)
    at lookupTokenUsingModuleInjector (core.mjs:4608:39)
    at getOrCreateInjectable (core.mjs:4656:12)
    at ɵɵdirectiveInject (core.mjs:11801:19)
    at Module.ɵɵinject (core.mjs:848:60)
    at resolvePromise (zone.js:1193:31)
    at resolvePromise (zone.js:1147:17)
    at zone.js:1260:17
    at _ZoneDelegate.invokeTask (zone.js:402:31)
    at core.mjs:10757:55
    at AsyncStackTaggingZoneSpec.onInvokeTask (core.mjs:10757:36)
    at _ZoneDelegate.invokeTask (zone.js:401:60)
    at Object.onInvokeTask (core.mjs:11070:33)
    at _ZoneDelegate.invokeTask (zone.js:401:60)
    at Zone.runTask (zone.js:173:47)
I am trying to work with AWS in angular but at the very start after I install AWS-SDK:
npm install aws-sdk

After adding the below to my file-manager.ts, I am getting errors regarding node and stream.
import * as aws from 'aws-sdk';

I added the following as suggested buy the compiler:
Try `npm i --save-dev @types/node` and then add 'node' to the types field in your tsconfig.

and still getting so many errors.
We are trying to implement deferrable views for a component in angular. This component is present in a component which is used by a parent in another repo. While defer seems to be working when we implemented it inside component of the same project, its not working when imported and used in a library. Two issue here actually:

code is not split into a new bundle but loaded along with the main library bundle
placeholder element appears for a split second and then the view disappears. on checking the html i found that I cannot see the child elements of the deferred component, its just like a dummy element


Here are the things which I have followed as a requirement:

Using angular 17 in both the main project and library project
Using on viewport condition to defer the block
the component inside the defer block is a standalone component
component is not used anywhere outside the defer block and also not referenced using viewchild

Is there anything I'm doing wrong or any additional requirement I need to follow ?
I have this
<div
    *ngFor="let dt of totals"
    [ngClass]="{ up: dt.isUp }"
>
    <span> {{ dt }}</span>
</div>

and I want to refactor to angular v17 syntax
@for (dt of totals; track $index) {
    <span>{{ dt }}</span>
}

How do I refactor the [ngClass] on the <div>?
I tried this but obviously It doesn't work because the variable dt is not yet defined inthe <div>
<div [ngClass]="{ up: dt.isUp }">
    @for (dt of totals; track $index) {
        <span>{{ dt }}</span>
    }
</div>

I could try this but I don't want an extra ng-container on every element:
<div>
    @for (dt of totals; track $index) {
        <ng-container [ngClass]="{ up: dt.isUp }">
            <span>{{ dt }}</span>
        </ng-container>
    }
 </div>

What's the official way to do this?
edit:
Thanks for the help, I got the resolution I needed. The question is silly because I forgot that the *ngFor repeats the element it is in and its children. I forgot that and thought it was only repeating its children. That is basic pre-v17 angular. I'll leave this question in case this catches anyone else.
Hi i'm new to angular 17, i'm following the course tour of heroes on the website.
After creating the project, i create a new component heroes just like the tutorial tells me to.
I add the component selector to app.component.html like this :
<app-heroes></app-heroes>
As i am trying to serve the project i have this error :
[ERROR] NG8001: 'app-heroes' is not a known element:

If 'app-heroes' is an Angular component, then verify that it is included in the '@Component.imports' of this component.

If 'app-heroes' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@Component.schemas' of this component to suppress this message. [plugin angular-compiler]
src/app/app.component.html:0:0:
0 │
╵ ^


Error occurs in the template of component AppComponent.
src/app/app.component.ts:9:15:
  9 │   templateUrl: './app.component.html',

Can someone help please ??
I tried to do ng serve --open and want it to serve in my browser but it's not working.
My Application has some generic pages like the landing or logout page which are navigatable when the user is not logged in. Those shall be rendered normally within the primary router-outlet.
Then I have Pages that are for logged-in users as the core of the application state and those pages shall be rendered within a general layout component that contains the navigation, footer, header etc.
I am having trouble to render those children within a named router-outlet that I expect to be within my layout component.
app.routes.ts
export const routes: Routes = [
{ path: '', redirectTo: 'landing', pathMatch: 'full' },
{
    path: 'landing',
    component: LandingPageComponent
},
{
    path: 'intern',
    component: NavigationComponent,
    children: [
        {
            path: 'enterprise',
            component: OverviewComponent,
        },
        { path: '', redirectTo: 'enterprise', pathMatch: 'full' },
    ]
},

];
navigation.component.html
<header></header>
<router-outlet name="intern"></router-outlet>
<footer></footer>

Landing and Navigation component are rendered as expected, but the content of the pages that I want to be within the navigation component in the named router-outled "intern" are not there. Sidenote: As I understood - as long as the child route and the named router-outlet share the same name (here 'intern'), i do not need to define the "outled: 'intern'" property in the app.routes.ts