Updated to angular 11

Now compiling with strict mode in typescript
Need to error checking now

bookie/src/app/section-printers/section-printer.component.spec.ts

@@ -1,4 +1,4 @@
-import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+import { ComponentFixture, TestBed, waitForAsync } from '@angular/core/testing';
 
 import { SectionPrinterComponent } from './section-printer.component';
 
@@ -6,11 +6,13 @@ describe('SectionPrinterComponent', () => {
   let component: SectionPrinterComponent;
   let fixture: ComponentFixture<SectionPrinterComponent>;
 
-  beforeEach(async(() => {
-    TestBed.configureTestingModule({
-      declarations: [SectionPrinterComponent],
-    }).compileComponents();
-  }));
+  beforeEach(
+    waitForAsync(() => {
+      TestBed.configureTestingModule({
+        declarations: [SectionPrinterComponent],
+      }).compileComponents();
+    }),
+  );
 
   beforeEach(() => {
     fixture = TestBed.createComponent(SectionPrinterComponent);

bookie/src/app/section-printers/section-printer.component.ts

@@ -1,5 +1,5 @@
 import { Component, ElementRef, OnInit, ViewChild } from '@angular/core';
-import { FormArray, FormBuilder, FormGroup } from '@angular/forms';
+import { AbstractControl, FormArray, FormBuilder, FormGroup } from '@angular/forms';
 import { MatDialog } from '@angular/material/dialog';
 import { ActivatedRoute, Router } from '@angular/router';
 import { BehaviorSubject } from 'rxjs';
@@ -20,14 +20,14 @@ import { SectionPrinterService } from './section-printer.service';
   styleUrls: ['./section-printer.component.css'],
 })
 export class SectionPrinterComponent implements OnInit {
-  @ViewChild('section', { static: true }) sectionElement: ElementRef;
+  @ViewChild('section', { static: true }) sectionElement?: ElementRef;
   form: FormGroup;
-  dataSource: SectionPrinterDataSource;
   public listObservable = new BehaviorSubject<SectionPrinter[]>([]);
-  list: SectionPrinter[];
-  sections: Section[];
-  printers: Printer[];
-  sectionId: string;
+  dataSource: SectionPrinterDataSource = new SectionPrinterDataSource(this.listObservable);
+  list: SectionPrinter[] = [];
+  sections: Section[] = [];
+  printers: Printer[] = [];
+  sectionId = '';
   displayedColumns = ['menuCategory', 'printer', 'copies'];
 
   constructor(
@@ -38,34 +38,30 @@ export class SectionPrinterComponent implements OnInit {
     private dialog: MatDialog,
     private ser: SectionPrinterService,
   ) {
-    this.createForm();
+    // Create form
+    this.form = this.fb.group({
+      section: '',
+      menuCategories: this.fb.array([]),
+    });
     route.params.pipe(map((p) => p.id)).subscribe((x) => {
       this.sectionId = x;
     });
   }
 
-  createForm() {
-    this.form = this.fb.group({
-      section: '',
-      menuCategories: this.fb.array([]),
-    });
-  }
-
   ngOnInit() {
-    this.route.data.subscribe(
-      (data: { list: SectionPrinter[]; sections: Section[]; printers: Printer[] }) => {
-        this.sections = data.sections;
-        this.printers = data.printers;
-        this.showItem(data.list);
-        this.dataSource = new SectionPrinterDataSource(this.listObservable);
-        this.listObservable.next(this.list);
-      },
-    );
+    this.route.data.subscribe((value) => {
+      const data = value as { list: SectionPrinter[]; sections: Section[]; printers: Printer[] };
+      this.sections = data.sections;
+      this.printers = data.printers;
+      this.showItem(data.list);
+      this.dataSource = new SectionPrinterDataSource(this.listObservable);
+      this.listObservable.next(this.list);
+    });
   }
 
   showItem(list: SectionPrinter[]) {
     this.list = list;
-    this.form.get('section').setValue(this.sectionId);
+    (this.form.get('section') as AbstractControl).setValue(this.sectionId);
     this.form.setControl(
       'menuCategories',
       this.fb.array(

bookie/src/app/section-printers/section-printer.service.ts

@@ -18,7 +18,7 @@ const serviceName = 'SectionPrinterService';
 export class SectionPrinterService {
   constructor(private http: HttpClient, private log: ErrorLoggerService) {}
 
-  get(id: string): Observable<SectionPrinter[]> {
+  get(id: string | null): Observable<SectionPrinter[]> {
     const getUrl: string = id === null ? `${url}` : `${url}/${id}`;
     return <Observable<SectionPrinter[]>>(
       this.http