TS errors

src/pages/lightbox/lightbox.ts

@@ -9,6 +9,7 @@ import { NavController, NavParams } from 'ionic-angular';
 export class LightboxPage {
 
   image: string;
+  tabNavEl: any;
 
   constructor(public navCtrl: NavController, private _params: NavParams) {
     this.image = this._params.get('image');