Updated to angular 11

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

bookie/src/app/sections/section-detail/section-detail.component.spec.ts

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

bookie/src/app/sections/section-detail/section-detail.component.ts

@@ -14,9 +14,9 @@ import { SectionService } from '../section.service';
   styleUrls: ['./section-detail.component.css'],
 })
 export class SectionDetailComponent implements OnInit, AfterViewInit {
-  @ViewChild('nameElement', { static: true }) nameElement: ElementRef;
+  @ViewChild('nameElement', { static: true }) nameElement?: ElementRef;
   form: FormGroup;
-  item: Section;
+  item: Section = new Section();
 
   constructor(
     private route: ActivatedRoute,
@@ -26,17 +26,15 @@ export class SectionDetailComponent implements OnInit, AfterViewInit {
     private toaster: ToasterService,
     private ser: SectionService,
   ) {
-    this.createForm();
-  }
-
-  createForm() {
+    // Create form
     this.form = this.fb.group({
       name: '',
     });
   }
 
   ngOnInit() {
-    this.route.data.subscribe((data: { item: Section }) => {
+    this.route.data.subscribe((value) => {
+      const data = value as { item: Section };
       this.showItem(data.item);
     });
   }
@@ -50,7 +48,9 @@ export class SectionDetailComponent implements OnInit, AfterViewInit {
 
   ngAfterViewInit() {
     setTimeout(() => {
-      this.nameElement.nativeElement.focus();
+      if (this.nameElement !== undefined) {
+        this.nameElement.nativeElement.focus();
+      }
     }, 0);
   }
 
@@ -67,7 +67,7 @@ export class SectionDetailComponent implements OnInit, AfterViewInit {
   }
 
   delete() {
-    this.ser.delete(this.item.id).subscribe(
+    this.ser.delete(this.item.id as string).subscribe(
       () => {
         this.toaster.show('Success', '');
         this.router.navigateByUrl('/sections');

bookie/src/app/sections/section-list/section-list.component.ts

@@ -11,15 +11,16 @@ import { SectionListDataSource } from './section-list-datasource';
   styleUrls: ['./section-list.component.css'],
 })
 export class SectionListComponent implements OnInit {
-  dataSource: SectionListDataSource;
-  list: Section[];
+  list: Section[] = [];
+  dataSource: SectionListDataSource = new SectionListDataSource(this.list);
   /** Columns displayed in the table. Columns IDs can be added, removed, or reordered. */
   displayedColumns = ['name'];
 
   constructor(private route: ActivatedRoute) {}
 
   ngOnInit() {
-    this.route.data.subscribe((data: { list: Section[] }) => {
+    this.route.data.subscribe((value) => {
+      const data = value as { list: Section[] };
       this.list = data.list;
     });
     this.dataSource = new SectionListDataSource(this.list);

bookie/src/app/sections/section.service.ts

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