Upgrading to Angular 20:

Replaced checked in package-lock.json by regenerated one.
Ran ng update @angular/core@20 @angular/cli@20
Ran npm install @angular-builders/jest@^20.0.0 @fortawesome/angular-fontawesome@^3.0.0 @swimlane/ngx-graph@^11
Ran npm install ngx-mat-select-search@^8.0.2.
Ran ng update @angular/material@20.
Updated all eslint and typescript to the latest versions.
Removed @angular-devkit/schematics.
Updated fontawesome.
Updated rxjs and tslib.
Moved required node version from 16 to 20.
Updated jest-preset-angular.
Set preserveWhitespaces to false.
Corrected two type declarations in two typescript files to make ng serve run without errors.
Removed unused angular-devkit/schematics from view-user.component.ts .
Updated list of supported browsers.
Upgraded prettier.
Ran prettier . --write the first time.
Ran prettier . --write the second time.
Ran ng generate @angular/core:inject with defaults, excepted a handful of files.
Fixed remaining eslint problems.
Added dist directory to ignores in eslint.config.js.
Let prettier fix formatting, almost everything is just line breaks.
Made htmlhint ignore @if and @for Angular constructs.
Updated node version in Github workflow to 22.12.0 (build.yml).
Updated .env.ts.
Updated Angular datetime format strings from YYYY-MM-DD to yyyy-MM-dd.
Merged changes from dev into angular20 branch.

src/app/groups/groups-view/group-actions/group-assign-staff/group-assign-staff.component.html

@@ -6,14 +6,18 @@
           <mat-form-field class="flex-48">
             <mat-label>{{ 'labels.inputs.Staff' | translate }}</mat-label>
             <mat-select formControlName="staffId">
-              <mat-option *ngFor="let staff of staffData" [value]="staff.id">
-                {{ staff.displayName }}
-              </mat-option>
+              @for (staff of staffData; track staff) {
+                <mat-option [value]="staff.id">
+                  {{ staff.displayName }}
+                </mat-option>
+              }
             </mat-select>
-            <mat-error *ngIf="groupAssignStaffForm.controls.staffId.hasError('required')">
-              {{ 'labels.inputs.Staff' | translate }} {{ 'labels.commons.is' | translate }}
-              <strong>{{ 'labels.commons.required' | translate }}</strong>
-            </mat-error>
+            @if (groupAssignStaffForm.controls.staffId.hasError('required')) {
+              <mat-error>
+                {{ 'labels.inputs.Staff' | translate }} {{ 'labels.commons.is' | translate }}
+                <strong>{{ 'labels.commons.required' | translate }}</strong>
+              </mat-error>
+            }
           </mat-form-field>
         </div>
       </mat-card-content>

src/app/groups/groups-view/group-actions/group-assign-staff/group-assign-staff.component.ts

@@ -1,5 +1,5 @@
 /** Angular Imports */
-import { Component, OnInit } from '@angular/core';
+import { Component, OnInit, inject } from '@angular/core';
 import { UntypedFormGroup, UntypedFormBuilder, ReactiveFormsModule } from '@angular/forms';
 import { ActivatedRoute, Router, RouterLink } from '@angular/router';
 
@@ -19,6 +19,11 @@ import { STANDALONE_SHARED_IMPORTS } from 'app/standalone-shared.module';
   ]
 })
 export class GroupAssignStaffComponent implements OnInit {
+  private formBuilder = inject(UntypedFormBuilder);
+  private groupsService = inject(GroupsService);
+  private route = inject(ActivatedRoute);
+  private router = inject(Router);
+
   /** Group Assign Staff form. */
   groupAssignStaffForm: UntypedFormGroup;
   /** Staff Data */
@@ -33,12 +38,7 @@ export class GroupAssignStaffComponent implements OnInit {
    * @param {ActivatedRoute} route Activated Route
    * @param {Router} router Router
    */
-  constructor(
-    private formBuilder: UntypedFormBuilder,
-    private groupsService: GroupsService,
-    private route: ActivatedRoute,
-    private router: Router
-  ) {
+  constructor() {
     this.route.data.subscribe((data: { groupActionData: any }) => {
       this.groupData = data.groupActionData;
     });