What is the best way to transfer login information to the next stage in Angular 4?

I am currently developing a project in Angular 4 and have encountered an issue with passing login information to the next state upon successfully changing states. In AngularJS, we could achieve this using stateParams, but I'm unsure of how to implement it in Angular 4. Can anyone guide me on how to accomplish this in Angular 4?

Here's the code snippet I'm working with:


import { Component, OnInit } from '@angular/core';
import { Http, Response, Headers, RequestOptions } from '@angular/http';
import { Router } from '@angular/router';

// Other imports...

@Component({
  selector: 'app-login',
  templateUrl: './login.component.html',
  styleUrls: ['./login.component.css']
})
export class LoginComponent implements OnInit {

constructor(private router: Router, private http: Http) { }

signup(){
    this.router.navigate(['register']);
}

createAuthorizationHeader(headers: Headers) {
    // Authorization logic here...
}   

onSubmit(userForm: NgForm){
    // Form submission logic here...
} 

ngOnInit() {
}

Answer №1

Include the following code in your existing component:

this.router.navigate(['/home'], {queryParams: {data: data}});

You can also set up a subscription in the designated component:

constructor(private _route:ActivatedRoute){}

this._route.params.subscribe(params => {
  console.log(params);
});

Answer №2

To achieve this functionality using router.navigate, you can follow these steps:

this.router.navigate(['/home'], { queryParams: { param: 'value' } });

Alternatively, you can simplify it by doing:

this.router.navigate(['/home'], param);

If you want to retrieve the parameters in another component as an observable, you can use the following code:

import { Component, OnInit } from '@angular/core';
import { ActivatedRoute } from '@angular/router';
/* other imports */

@Component({
  /* selector, template and more */
})

export class YourComponent implements OnInit {
  constructor(
    private route: ActivatedRoute
  ) {}

  ngOnInit() {
     this.route.params.subscribe(params => {
        console.log(params);
     });
  }
}

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