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/notifications/notifications-page/notifications-page.component.ts

@@ -1,5 +1,5 @@
 /** Angular Imports */
-import { Component, OnInit, ViewChild } from '@angular/core';
+import { Component, OnInit, ViewChild, inject } from '@angular/core';
 import { MatPaginator } from '@angular/material/paginator';
 import { MatSort, MatSortHeader } from '@angular/material/sort';
 import {
@@ -45,6 +45,8 @@ import { STANDALONE_SHARED_IMPORTS } from 'app/standalone-shared.module';
   ]
 })
 export class NotificationsPageComponent implements OnInit {
+  private route = inject(ActivatedRoute);
+
   /** Notifications data. */
   notificationsData: any;
   /** Columns to be displayed in notifications table. */
@@ -81,7 +83,7 @@ export class NotificationsPageComponent implements OnInit {
    * Retrieves the notifications data from `resolve`.
    * @param {ActivatedRoute} route Activated Route.
    */
-  constructor(private route: ActivatedRoute) {
+  constructor() {
     this.route.data.subscribe((data: { notifications: any }) => {
       this.notificationsData = data.notifications.pageItems;
     });

src/app/notifications/notifications-routing.module.ts

@@ -23,7 +23,6 @@ const routes: Routes = [
       }
     }
   ])
-
 ];
 
 @NgModule({

src/app/notifications/notifications.resolver.ts

@@ -1,5 +1,5 @@
 /** Angular Imports */
-import { Injectable } from '@angular/core';
+import { Injectable, inject } from '@angular/core';
 
 /** rxjs Imports */
 import { Observable } from 'rxjs';
@@ -12,10 +12,7 @@ import { NotificationsService } from './notifications.service';
  */
 @Injectable()
 export class NotificationsResolver {
-  /**
-   * @param {NotificationsService} notificationsService Notifications service.
-   */
-  constructor(private notificationsService: NotificationsService) {}
+  private notificationsService = inject(NotificationsService);
 
   /**
    * Returns the Notifications data.

src/app/notifications/notifications.service.ts

@@ -1,5 +1,5 @@
 /** Angular Imports */
-import { Injectable } from '@angular/core';
+import { Injectable, inject } from '@angular/core';
 import { HttpClient, HttpParams } from '@angular/common/http';
 
 /** rxjs Imports */
@@ -12,10 +12,7 @@ import { Observable, of } from 'rxjs';
   providedIn: 'root'
 })
 export class NotificationsService {
-  /**
-   * @param {HttpClient} http Http Client to send requests.
-   */
-  constructor(private http: HttpClient) {}
+  private http = inject(HttpClient);
 
   /**
    * @returns {Observable<any>} Notifications.