home.ts

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

import { Platform } from 'ionic-angular';

declare var ApiAIPromises: any;

@Component({
  selector: 'page-home',
  templateUrl: 'home.html'
})
export class HomePage {
  answer;

  constructor(public platform: Platform, public ngZone: NgZone) {
    platform.ready().then(() => {
      ...

    });
  }
}