How do I pass data to Angular routed components?

Question

In one of my Angular 2 routes\'s templates (FirstComponent) I have a button

first.component.html

Answer 1

say you have

1. component1.ts
2. component1.html

and you want to pass data to component2.ts.

• in component1.ts is a variable with data say

    //component1.ts
    item={name:"Nelson", bankAccount:"1 million dollars"}
  
    //component1.html
     //the line routerLink="/meter-readings/{{item.meterReadingId}}" has nothing to 
    //do with this , replace that with the url you are navigating to
    
      View
    
  
    //component2.ts
    import { ActivatedRoute} from "@angular/router";
    import 'rxjs/add/operator/filter';
  
    /*class name etc and class boiler plate */
    data:any //will hold our final object that we passed 
    constructor(
    private route: ActivatedRoute,
    ) {}
  
   ngOnInit() {
  
   this.route.queryParams
    .filter(params => params.reading)
    .subscribe(params => {
    console.log(params); // DATA WILL BE A JSON STRING- WE PARSE TO GET BACK OUR 
                         //OBJECT
  
    this.data = JSON.parse(params.item) ;
  
    console.log(this.data,'PASSED DATA'); //Gives {name:"Nelson", bankAccount:"1 
                                          //million dollars"}
     });
    }