Browser back button redirecting to home page in angular 8 - angular8

Question

Browser back button is not working. It redirects me to the home page instead of going to the previous page.
e.g
http://localhost:4200/#/component1/1
http://localhost:4200/#/component2/1
http://localhost:4200/#/component3/1
When I click back button when I am in component3 it has goes to component2 instead its going to the home page. Can anyone tell me the solution to this problem?
routing.ts
{
path: 'component1/:id',
component: Component1,
canActivate: [OAuthCallbackHandlerGuard],
data: { isId: true },
},
{
path: 'component2/:id',
component: Component2,
canActivate: [OAuthCallbackHandlerGuard],
data: { isId: true },
},
{
path: 'component3/:id',
component: Component3,
canActivate: [OAuthCallbackHandlerGuard],
data: { isId: true },
},
oauthcallbackhandlerguard.service.ts
canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<boolean | UrlTree> {
this.adalService.handleWindowCallback();
let engId: number = 0;
let engagementDetailId: number = 0;
if(route.data.isEngagementDetailId == true)
{
let engDetailData =this.engagementService.$engagementDetailId.subscribe((data) => {
if (data !== undefined && data !== null) {
engagementDetailId = data;
}
});
}
else
{
let engData =this.engagementService.$engagementId.subscribe((data) => {
if (data !== undefined && data !== null) {
engId = data;
}
});
}
let groupIds = JSON.parse(sessionStorage.getItem('groupids'));
return this.validateUserAccess(engId, engagementDetailId, state,groupIds);
}
private validateUserAccess(engId: number, engagementDetailId: number, state: RouterStateSnapshot,groupIds:number[]): Observable<boolean | UrlTree> {
if (engId > 0 || engagementDetailId>0) {
return this.authGuardService.validateUserAccess(engagementDetailId, engId,groupIds).map(response => {
console.log(response);
return response ? true : this.router.parseUrl('/unauthorized');
if (response) {
this.router.navigate([state.url]);
}
else {
this.redictToUnAutherized();
}
},
(error) => {
console.log('auth failed. Error ', error);
// this.redictToUnAutherized();
return false;
});
}
else {
return Observable.of(true);
}
}
private redictToUnAutherized() {
this.router.navigate(['/unauthorized']);
}

Answer 1

1- Run your app in diffrent browser
2- Add default routes
const routes: Routes = [
{ path: '', pathMatch: 'full', component: HomeComponent },
{
path: 'component1/:id',
component: Component1,
canActivate: [OAuthCallbackHandlerGuard],
data: { isId: true },
},
{
path: 'component2/:id',
component: Component2,
canActivate: [OAuthCallbackHandlerGuard],
data: { isId: true },
},
{
path: 'component3/:id',
component: Component3,
canActivate: [OAuthCallbackHandlerGuard],
data: { isId: true },
},
{ path: '**', component: HomeComponent }
];
3- Try to check in OAuthCallbackHandlerGuard if it is going to navigate page back and allow it with Auth
constructor (private _location: Location)
this._location.back();