/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

0 vote184 views1 answer
Filter table with multiple input in angular
Javascript AngularJS
0 vote184 views1 answer
Angular pass async pipe value to funciton
Javascript AngularJS
0 vote181 views2 answers
Angular 9 radio button checked
Javascript AngularJS
17 votes223 views3 answers
Angular pipe for 2 decimal places
Javascript AngularJS
0 vote183 views1 answer
Angular inner page in refresh 404 after ng build
Javascript AngularJS
0 vote192 views1 answer
How to pass basic auth for api in angular 11
Javascript AngularJS
0 vote175 views1 answer
Angularjs select placeholder
Javascript AngularJS
4 votes192 views1 answer
Declare * angular jquery
Javascript AngularJS
0 vote270 views1 answer
Cannot create an instance of an abstract class httphandler angular
Javascript AngularJS
0 vote226 views1 answer
Angular $http abort request
Javascript AngularJS