/Javascript/AngularJS/Warn user before leaving page angular

Warn user before leaving page angular

import { CanDeactivate } from '@angular/router';
import { Injectable } from '@angular/core';
import { Observable } from 'rxjs/Observable';

export interface ComponentCanDeactivate {
  canDeactivate: () => boolean | Observable<boolean>;
}

@Injectable()
export class PendingChangesGuard implements CanDeactivate<ComponentCanDeactivate> {
  canDeactivate(component: ComponentCanDeactivate): boolean | Observable<boolean> {
    // if there are no pending changes, just allow deactivation; else confirm first
    return component.canDeactivate() ?
      true :
      // NOTE: this warning message will only be shown when navigating elsewhere within your angular app;
      // when navigating away from your angular app, the browser will show a generic warning message
      // see http://stackoverflow.com/a/42207299/7307355
      confirm('WARNING: You have unsaved changes. Press Cancel to go back and save these changes, or OK to lose these changes.');
  }
}

Source: stackoverflow.com

Similar codes

-1 vote326 views1 answer
Angular how to navigate back
Javascript AngularJS
8 votes265 views3 answers
Angular [routerlink]
Javascript AngularJS
3 votes274 views1 answer
Start angular app server
Javascript AngularJS
24 votes300 views2 answers
Uninstall angular cli
Javascript AngularJS
0 vote345 views1 answer
Localhost:3000 ad is not working with outlook angular 8
Javascript AngularJS
1 vote334 views1 answer
Angular JavaScript heap out of memory
Javascript AngularJS
3 votes281 views5 answers
Angular img
Javascript AngularJS
0 vote322 views2 answers
Utiliser les données passees a un modal dans son propre composant en angular
Javascript AngularJS
0 vote330 views1 answer
Angular array export to excel
Javascript AngularJS
-1 vote307 views2 answers
Activate router angular
Javascript AngularJS