ionic-framework/demos/navigation/index.ts

import { Component } from '@angular/core';

import { Config, ionicBootstrap, NavController, NavParams, Platform } from 'ionic-angular';

var PAGE_NUM = 2;


@Component({
  templateUrl: 'main.html'
})
export class ApiDemoPage {
  constructor(public navCtrl: NavController) {}

  push() {
    this.navCtrl.push(PushPage);
  }
}

@Component({
  templateUrl: "page.html"
})
export class PushPage {
  pageNum = PAGE_NUM;

  constructor(public navCtrl: NavController) {}

  push() {
    PAGE_NUM++;
    this.navCtrl.push(PushPage);
  }

  pop() {
    if (PAGE_NUM > 2) {
      PAGE_NUM--;
    }
    this.navCtrl.pop();
  }
}


@Component({
  template: '<ion-nav [root]="root"></ion-nav>'
})
class ApiDemoApp {
  root = ApiDemoPage;
}

ionicBootstrap(ApiDemoApp);