Send data through routing paths in Angular

There is a lot of confusion on this topic because there are so many different ways to do it.

Here are the appropriate types used in the following screen shots:

private route: ActivatedRouteprivate router: Router

1) Required Routing Parameters:

2) Route Optional Parameters:

3) Route Query Parameters:

4) You can use a service to pass data from one component to another without using route parameters at all.

For an example see: https://blogs.msmvps.com/deborahk/build-a-simple-angular-service-to-share-data/

I have a plunker of this here: https://plnkr.co/edit/KT4JLmpcwGBM2xdZQeI9?p=preview

There is a new method what came with Angular 7.2.0

https://angular.io/api/router/NavigationExtras#state

Send:

this.router.navigate(['action-selection'], { state: { example: 'bar' } });

Receive:

constructor(private router: Router) {  console.log(this.router.getCurrentNavigation().extras.state.example); // should log out 'bar'}

You can find some additional info here:

https://github.com/angular/angular/pull/27198

The link above contains this example which can be useful:https://stackblitz.com/edit/angular-bupuzn

Latest version of angular (7.2 +) now has the option to pass additional information using NavigationExtras.

Home component

import {  Router,  NavigationExtras} from '@angular/router';const navigationExtras: NavigationExtras = {  state: {    transd: 'TRANS001',    workQueue: false,    services: 10,    code: '003'  }};this.router.navigate(['newComponent'], navigationExtras);

newComponent

test: string;constructor(private router: Router) {  const navigation = this.router.getCurrentNavigation();  const state = navigation.extras.state as {    transId: string,    workQueue: boolean,    services: number,    code: string  };  this.test = "Transaction Key:" + state.transId + "<br /> Configured:" + state.workQueue + "<br /> Services:" + state.services + "<br /> Code: " + state.code;}

Output

Hope this would help!