Can't bind to 'ngForOf' since it isn't a known property of 'ion-item' in Ionic / Angular 9

Question

When trying to populate simple radio group list with phone numbers

Can't bind to 'ngForOf' since it isn't a known property of 'ion-item'.

Issue is related to Angular 9. Possible solutions says that BrowserModule and Common module needs to be in place. Think I got that. Yet, error is still there.

Ionic info:

   Ionic CLI                     : 5.4.13 
   Ionic Framework               : @ionic/angular 5.1.0
   @angular-devkit/build-angular : 0.901.4
   @angular-devkit/schematics    : 9.1.4
   @angular/cli                  : 9.1.4
   @ionic/angular-toolkit        : 2.2.0

Capacitor:
   Capacitor CLI   : 2.0.2
   @capacitor/core : 2.0.2

Cordova:
   Cordova CLI       : 9.0.0 ([email protected])
   Cordova Platforms : android 8.1.0
   Cordova Plugins   : cordova-plugin-ionic-keyboard 2.2.0, cordova-plugin-ionic-webview 4.2.1, (and 6 other plugins)

Utility:
   cordova-res (update available: 0.15.0) : 0.6.0
   native-run (update available: 1.0.0)   : 0.2.8

add-number.page.ts

import { Component, Input, OnInit, ViewChild } from '@angular/core';
import { ModalController, ToastController, IonRadioGroup } from '@ionic/angular';
import { FirebaseAuthService } from 'src/app/services/auth/user/auth_user.service';
import { PlayerDetailsModel } from '../../../../models';
import { FirebasePlayerService } from '../../../../services/firebase/players/firebase-players.service';


@Component({
  selector: 'app-add-number',
  templateUrl: './add-number.page.html',
  styleUrls: [
    './styles/add-number.modal.scss',
    './styles/add-number.shell.scss',
  ],
})
export class AddNumberPage implements OnInit {
  @Input() isModalRequired = false;
  @ViewChild('radioGroup') radioGroup: IonRadioGroup;

  public availableNumbers: string[] = [];
  // radioForm: FormGroup;
  //Get value on ionSelect on IonRadio item
  selected_number: any;

  constructor(
    private _modalController: ModalController,
    private _toastController: ToastController,
    private _playerService: FirebasePlayerService,
    private _authService: FirebaseAuthService
  ) {

  }

  radioGroupChange(event) {
    console.log("radioGroupChange", event.detail);
  }

  radioSelect(event) {
    console.log("radioSelect",event.detail);
    this.selected_number = event.detail;
  }


  public dismissModal() {
    this._modalController.dismiss();
  }

  private initalizeForm() {}

  ngOnInit() {
    this.availableNumbers.push("+16673039999")
    this.availableNumbers.push("+16673039998")
    this.availableNumbers.push("+16673039997")
  this.availableNumbers.push("+16673039996")

  console.log(this.availableNumbers)
  // this.selected_number = this.availableNumbers[0];

   }

}

add-number.module.ts

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { FormsModule } from '@angular/forms';
import { IonicModule } from '@ionic/angular';
import { AddNumberPageRoutingModule } from './add-number-routing.module';
import { AddNumberPage } from './add-number.page';

@NgModule({
  imports: [
    CommonModule,
    FormsModule,
    IonicModule,
    AddNumberPageRoutingModule
  ],
  declarations: [AddNumberPage]
})
export class AddNumberPageModule {}

add-number.page.html

 <ion-content class="update-user-content">
    <section class="user-details-fields fields-section">

      <ion-list>

        <ion-radio-group  name="radio-group" allow-empty-selection="true" (ionChange)="radioGroupChange($event)"  #radioGroup>
          <ion-list-header>
            <ion-label>Pick your TomLine phone number</ion-label>
          </ion-list-header>

          <ion-item *ngFor="let number of availableNumbers" (ionSelect)="radioSelect($event)">
            <ion-label>{{number}}</ion-label>
            <ion-radio slot="start"  value="{{number}}" ></ion-radio>
          </ion-item>

        </ion-radio-group>
      </ion-list>

    </section>
  </ion-content>

Any idea how to fix this ?

.

Edit: https://pastebin.com/pVbFa6X3 app.module.ts

Answer 1

I had the same problem. I assume that AddNumberPage is being leveraged as a modal somewhere in your app, but I cannot see where. Since you have placed this Modal within its own module, you have to import that module within the module from wherever your Modal is created from.