Angular 4 ngOninit not invoke when routing from on component to another component using Facebook login api

[Prabakaran V]

I am using angular 4. when routing from one component to another component ngOninit not invoking. i have tried different methos but no use.

Here is my code: 

app-router.module.ts

    import { NgModule } from '@angular/core';

    import { Routes, RouterModule } from '@angular/router';

    

    import { GetStartedComponent } from './auth/get-started/get-started.component';

    import { FbregisterComponent } from './auth/fbregister/fbregister.component';

    

    

    const routes: Routes = [ 

      { path: 'GetStarted', component: GetStartedComponent, pathMatch: 'full' },

      { path: 'Fbregister', component: FbregisterComponent, pathMatch: 'full'}

    ];

    

    @NgModule({

      imports: [RouterModule.forRoot(routes)],

      exports: [RouterModule]

    })

    export class AppRoutingModule { }

getstarted.component.ts:

Here i am using facebook api 

    onfacebooklogin(httpobj,navobj,navthis){

        FB.Event.subscribe('auth.statusChange', (response => {

            if (response.status === 'connected') {

                FB.login(function () {          

                let accessToken = response.authResponse.accessToken;

                FB.api('/me', 'get', { access_token: accessToken, fields: 'id,name,gender,email,first_name,last_name' }, function(response) {              

                    sessionStorage.setItem('fbAccessToken',accessToken);

                    if (true) {

    

                        console.log('You are now logged in.');

                        AWS.config.update({

                            region: CognitoUtil._REGION,

                            credentials: new AWS.CognitoIdentityCredentials({

                                IdentityPoolId: CognitoUtil._IDENTITY_POOL_ID,

                                Logins: {

                                    'graph.facebook.com': accessToken,                                       

                                },                          

                            })     

                        });

                        console.log("accesstoken", accessToken);

                        navthis.zone.run(() => {

                            httpobj.get('/api.json' + response.id)

                            .map( res => {

                                if (res) {

                                    if (res.status === 200) {

                                        sessionStorage.setItem('faceBookLoginValid',accessToken);                              

                                        navobj.navigate(['/']);    // Here i am routing the component                            

                                    } 

                                }

                            }) 

                            .catch(() =>{                      

                                sessionStorage.setItem('FacebookDetails', JSON.stringify(response));                                                        

                                navobj.navigate(['/facebookRegistration']); // Here i am routing the component

                            })

                            .subscribe((data) => {},

                            err => {});  

                        });   

                    } else {

                        //console.log('There was a problem logging you in.');

                    }

    

                });

            });

            } else {

                console.log("not connected");

            }

    

        }));

      }

fbregister.component.ts:  

    import { Component, OnInit, NgZone } from '@angular/core';

    import { Http, Headers, Response, RequestOptions  } from "@angular/http";

    import { Router, ActivatedRoute, Params, ParamMap,  } from '@angular/router';    

  

    @Component({

      selector: 'app-fbregister',

      templateUrl: './fbregister.component.html',

      providers:[RegistrationFacebookUser1],

      styleUrls: ['./fbregister.component.css'],

    

    })

    export class FbregisterComponent implements OnInit {    

      public name1: string;

      public lname1: string;

      public email1: string;     

      constructor(public http:Http, private sharedService: SharedService, public registrationUser:RegistrationFacebookUser1, 

        public registrationService:RegistrationService, public router:Router, private zone:NgZone) {}

    

      public ngOnInit() {        

        console.log("test praba");

        var retrievedObject = sessionStorage.getItem('FacebookDetails');    

        var parsedObject = JSON.parse(retrievedObject);    

        console.log('tett',parsedObject);  

        this.email1 =  parsedObject.email; 

        this.name1 =  'test1111';        

        console.log('test',this.email1);  

       

      }

    

    }

HTML   

     {{name1}}<br>{{email1}}

While routing to this component ngOnint called i have tested using console but its not printed. but when i refresh the page it will load the ngOninit.

I am using sessionstorage to retrive datas. i need to display retrived datas to html while routing from one component to another component.

Original post stackoverflow link : https://stackoverflow.com/q/46462531/5028339

[Prabakaran V]

I am using angular 4. when routing from one component to another component ngOninit not invoking. i have tried different methos but no use.

While routing to this component ngOnint called i have tested using console but its not printed. but when i refresh the page it will load the ngOninit.

I am using sessionstorage to retrive datas. i need to display retrived datas to html while routing from one component to another component.

Original code stackoverflow link here: https://stackoverflow.com/q/46462531/5028339

[Soja C]

That is you get the data from the session storage only after refreshing FbRegisterComponent's HTML page.On the first time page routes, but you do not get data from Session Storage.Am I correct?

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