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/pipes/date-format.pipe.ts

@@ -1,10 +1,10 @@
-import { Pipe, PipeTransform } from '@angular/core';
+import { Pipe, PipeTransform, inject } from '@angular/core';
 import { SettingsService } from 'app/settings/settings.service';
 import moment from 'moment';
 
 @Pipe({ name: 'dateFormat' })
 export class DateFormatPipe implements PipeTransform {
-  constructor(private settingsService: SettingsService) {}
+  private settingsService = inject(SettingsService);
 
   transform(value: any, dateFormat?: string): any {
     const defaultDateFormat = this.settingsService.dateFormat.replace('dd', 'DD');

src/app/pipes/datetime-format.pipe.ts

@@ -26,7 +26,7 @@ export class DatetimeFormatPipe implements PipeTransform {
     } else {
       dateVal = moment(value as any);
     }
-    const fmt = datetimeFormat ?? 'YYYY-MM-DDTHH:mm:ssZ';
+    const fmt = datetimeFormat ?? 'yyyy-MM-ddTHH:mm:ssZ';
     return dateVal.format(fmt);
   }
 }

src/app/pipes/find.pipe.ts

@@ -1,4 +1,4 @@
-import { Pipe, PipeTransform, SecurityContext } from '@angular/core';
+import { Pipe, PipeTransform, SecurityContext, inject } from '@angular/core';
 import { DomSanitizer } from '@angular/platform-browser';
 
 /**
@@ -10,7 +10,7 @@ const lookupCache = new WeakMap<any[], Map<string, Map<any, any>>>();
 
 @Pipe({ name: 'find' })
 export class FindPipe implements PipeTransform {
-  constructor(private sanitizer: DomSanitizer) {}
+  private sanitizer = inject(DomSanitizer);
 
   transform(value: any, options: any, key: string, property: string): string {
     if (!options || !key || value === null || value === undefined) {

src/app/pipes/format-number.pipe.ts

@@ -1,13 +1,11 @@
 import { DecimalPipe } from '@angular/common';
-import { Pipe, PipeTransform } from '@angular/core';
+import { Pipe, PipeTransform, inject } from '@angular/core';
 import { SettingsService } from 'app/settings/settings.service';
 
 @Pipe({ name: 'formatNumber' })
 export class FormatNumberPipe implements PipeTransform {
-  constructor(
-    private decimalFormat: DecimalPipe,
-    private settingsService: SettingsService
-  ) {}
+  private decimalFormat = inject(DecimalPipe);
+  private settingsService = inject(SettingsService);
 
   transform(value: string | number, defaultValue: any): string {
     if (value === undefined) {

src/app/pipes/translate.pipe.ts

@@ -1,9 +1,9 @@
-import { Pipe, PipeTransform } from '@angular/core';
+import { Pipe, PipeTransform, inject } from '@angular/core';
 import { TranslateService } from '@ngx-translate/core';
 
 @Pipe({ name: 'translateKey', standalone: true })
 export class TranslatePipe implements PipeTransform {
-  constructor(private translateService: TranslateService) {}
+  private translateService = inject(TranslateService);
 
   transform(attributeValue: any, group: string, prefix: string = 'labels'): string {
     const translationKey = `${prefix}.${group}.${attributeValue}`;

src/app/pipes/yesno.pipe.ts

@@ -1,9 +1,9 @@
-import { Pipe, PipeTransform } from '@angular/core';
+import { Pipe, PipeTransform, inject } from '@angular/core';
 import { TranslateService } from '@ngx-translate/core';
 
 @Pipe({ name: 'yesNo' })
 export class YesnoPipe implements PipeTransform {
-  constructor(private translateService: TranslateService) {}
+  private translateService = inject(TranslateService);
 
   transform(value: boolean, ...args: unknown[]): string {
     if (value == null) {