Updated to angular 11

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

bookie/src/app/devices/device-detail/device-detail.component.ts

@@ -15,10 +15,10 @@ import { DeviceService } from '../device.service';
   styleUrls: ['./device-detail.component.css'],
 })
 export class DeviceDetailComponent implements OnInit, AfterViewInit {
-  @ViewChild('nameElement', { static: true }) nameElement: ElementRef;
+  @ViewChild('nameElement', { static: true }) nameElement?: ElementRef;
   form: FormGroup;
-  sections: Section[];
-  item: Device;
+  sections: Section[] = [];
+  item: Device = new Device();
 
   constructor(
     private route: ActivatedRoute,
@@ -28,10 +28,7 @@ export class DeviceDetailComponent implements OnInit, AfterViewInit {
     private toaster: ToasterService,
     private ser: DeviceService,
   ) {
-    this.createForm();
-  }
-
-  createForm() {
+    // Create form
     this.form = this.fb.group({
       name: '',
       section: '',
@@ -40,7 +37,8 @@ export class DeviceDetailComponent implements OnInit, AfterViewInit {
   }
 
   ngOnInit() {
-    this.route.data.subscribe((data: { item: Device; sections: Section[] }) => {
+    this.route.data.subscribe((value) => {
+      const data = value as { item: Device; sections: Section[] };
       this.showItem(data.item);
       this.sections = data.sections;
     });
@@ -57,7 +55,9 @@ export class DeviceDetailComponent implements OnInit, AfterViewInit {
 
   ngAfterViewInit() {
     setTimeout(() => {
-      this.nameElement.nativeElement.focus();
+      if (this.nameElement !== undefined) {
+        this.nameElement.nativeElement.focus();
+      }
     }, 0);
   }
 
@@ -74,7 +74,7 @@ export class DeviceDetailComponent 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('/devices');