[angular] How to Refresh a Component in Angular

I am working on an Angular project. I'm struggling with refresh action in a component.

I would like to refresh the router's components on button click. I have refresh button when I click on it the component/router need to be refresh.

I tried window.location.reload() and location.reload() these two are not suitable for my need. Please help if anyone aware of it.

this is little bit out of box and I dont know whether this helps you or not but have yo tried

this.ngOnInit();

its a function so whatever code you have in it will be recalled just like a refresh.

constructor(private router:Router, private route:ActivatedRoute ) { 
}

onReload(){
 this.router.navigate(['/servers'],{relativeTo:this.route})
}

Fortunately, if you are using Angular 5.1+, you do not need to implement a hack anymore as native support has been added. You just need to set onSameUrlNavigation to 'reload' in the RouterModule options :

@ngModule({
 imports: [RouterModule.forRoot(routes, {onSameUrlNavigation: ‘reload’})],
 exports: [RouterModule],
 })

More information can be found here: https://medium.com/engineering-on-the-incline/reloading-current-route-on-click-angular-5-1a1bfc740ab2

Other way to refresh (hard way) a page in angular 2 like this it's look like f5

import { Location } from '@angular/common';

constructor(private location: Location) {}

pageRefresh() {
   location.reload();
}

just do this : (for angular 9)

import { Inject } from '@angular/core';    
import { DOCUMENT } from '@angular/common';

constructor(@Inject(DOCUMENT) private document: Document){ }

someMethode(){ this.document.location.reload(); }

Adding this to code to the required component's constructor worked for me.

this.router.routeReuseStrategy.shouldReuseRoute = function () {
  return false;
};

this.mySubscription = this.router.events.subscribe((event) => {
  if (event instanceof NavigationEnd) {
    // Trick the Router into believing it's last link wasn't previously loaded
    this.router.navigated = false;
  }
});

Make sure to unsubscribe from this mySubscription in ngOnDestroy().

ngOnDestroy() {
  if (this.mySubscription) {
    this.mySubscription.unsubscribe();
  }
}

Refer to this thread for more details - https://github.com/angular/angular/issues/13831

router.navigate['/path'] will only takes you to the specified path
use router.navigateByUrl('/path')
it reloads the whole page

One more way without explicit route:

async reload(url: string): Promise<boolean> {
  await this.router.navigateByUrl('.', { skipLocationChange: true });
  return this.router.navigateByUrl(url);
}

In my application i have component and all data is coming from API which i am calling in Component's constructor. There is button by which i am updating my page data. on button click i have save data in back end and refresh data. So to reload/refresh the component - as per my requirement - is only to refresh the data. if this is also your requirement then use the same code written in constructor of component.

Use the this.ngOnInit(); to reload the same component instead reloading the entire page!!

DeleteEmployee(id:number)
  {
    this.employeeService.deleteEmployee(id)
    .subscribe( 
      (data) =>{
        console.log(data);

        this.ngOnInit();

      }),
      err => {
        console.log("Error");
      }   
  }

kdo

// reload page hack methode

push(uri: string) {
    this.location.replaceState(uri) // force replace and no show change
    await this.router.navigate([uri, { "refresh": (new Date).getTime() }]);
    this.location.replaceState(uri) // replace
  }

Just change the routeReuseStrategy from the angular Router:

this._router.routeReuseStrategy.shouldReuseRoute = function () {
      return false;
    };

Set the routerproperty "navigated" to false:

this._router.navigated = false;

Then navigate to your component:

this._router.navigate(['routeToYourComponent'])

After that reinstate the old/default routeReuseStrategy:

this._router.routeReuseStrategy.shouldReuseRoute = function (future: ActivatedRouteSnapshot, curr: ActivatedRouteSnapshot): boolean {
          return future.routeConfig === curr.routeConfig;

You can also make a service out of this:

@Injectable({
  providedIn: 'root'
})
export class RouterService {

  constructor(
    private _activatedRoute: ActivatedRoute,
    private _router: Router
  ) { }

  reuseRoutes(reuse: boolean) {
    if (!reuse) {
      this._router.routeReuseStrategy.shouldReuseRoute = function () {
        return false;
      };
    }
    if (reuse) {
      this._router.routeReuseStrategy.shouldReuseRoute = function (future: ActivatedRouteSnapshot, curr: ActivatedRouteSnapshot): boolean {
        return future.routeConfig === curr.routeConfig;
      };
    }
  }

  async refreshPage(url?: string) {
    this._router.routeReuseStrategy.shouldReuseRoute = function () {
      return false;
    };

    this._router.navigated = false;

    url ? await this._router.navigate([url]) : await this._router.navigate([], { relativeTo: this._activatedRoute });

    this._router.routeReuseStrategy.shouldReuseRoute = function (future: ActivatedRouteSnapshot, curr: ActivatedRouteSnapshot): boolean {
      return future.routeConfig === curr.routeConfig;
    };
  }
}

This can be achieved via a hack, Navigate to some sample component and then navigate to the component that you want to reload.

this.router.navigateByUrl('/SampleComponent', { skipLocationChange: true });
this.router.navigate(["yourLandingComponent"]);

html file

<a (click)= "getcoursedetails(obj.Id)" routerLinkActive="active" class="btn btn-danger">Read more...</a>

ts file

  getcoursedetails(id)
  { 
  this._route.navigateByUrl('/RefreshComponent', { skipLocationChange: true }).then(() => {
    this._route.navigate(["course",id]);
  });