Ionic 4 pass parm

Ionic Framework
1

Hi everyone, I have a problem with passing data from one page to another. The page that displays the data is called contents.page.html

<ion-header>
  <ion-toolbar>
    <ion-title>APPapagna 2.0</ion-title>
  </ion-toolbar>
</ion-header>

<ion-content>
     <ion-item *ngFor="let item of items">
        <ion-row>
          <ion-col col-3>
              {{item.Titolo}}
            </ion-col>
          <ion-col col-3>
            {{item.Nome_Punto}}
          </ion-col>
          <ion-col col-3>
              <button
              ion-button
              color="primary"
              item-right
              (click)="viewEntry(item)">view</button>
          </ion-col>
        </ion-row>

    </ion-item>
  

</ion-content>

this is the file code instead contenuti.page.ts

import { Component } from '@angular/core';
import { NavController, NavParams } from '@ionic/angular';
import { HttpClient } from '@angular/common/http';
import { Router } from '@angular/router';

@Component({
  selector: 'app-contenuti',
  templateUrl: './contenuti.page.html',
  styleUrls: ['./contenuti.page.scss'],
})
export class ContenutiPage {

   public items : Array<any> = [];

   constructor(
    public navCtrl: NavController,
    public http   : HttpClient, 
    public passa_var : Router
    )
     { }


   ionViewWillEnter() : void {
      this.load();
   }

   load() : void {
      this.http
      .get('http://www.my-dominio.com/retrieve-data.php')
      .subscribe((data : any) =>
      {
         console.dir(data);
         this.items = data;
      },
      (error : any) =>
      {
         console.dir(error);
      });
   }
  
  
   viewEntry(item) : void {
      ??????
   }


}

clicking on “view” I have to go to the detail page.
I can’t understand how to pass data to the detail page to view the data of the single record. Can anyone give me directions on how to pass data?

2

Chapter 3 of the Tour of Heroes illustrates the most typical way of approaching this pattern.