send data to different page ionic code example

Example 1: passing data from one page to another in ionic 4

import { Component, OnInit } from '@angular/core';
import { ActivatedRoute, Router } from '@angular/router';
 
@Component({
  selector: 'app-details',
  templateUrl: './details.page.html',
  styleUrls: ['./details.page.scss'],
})
export class DetailsPage implements OnInit {
 
  data: any;
 
  constructor(private route: ActivatedRoute, private router: Router) {
    this.route.queryParams.subscribe(params => {
      if (this.router.getCurrentNavigation().extras.state) {
        this.data = this.router.getCurrentNavigation().extras.state.user;
      }
    });
  }
 
  ngOnInit() { }
}

Example 2: passing data from one page to another in ionic 4

import { Injectable } from '@angular/core';
 
@Injectable({
  providedIn: 'root'
})
export class DataService {
 
  private data = [];
 
  constructor() { }
 
  setData(id, data) {
    this.data[id] = data;
  }
 
  getData(id) {
    return this.data[id];
  }
}