Use bound function

playground/src/screens/TextScreen.js

   constructor(props) {
     super(props);
     globalFirstComponentID = (props.text === 'This is tab 1') ? props.componentId : globalFirstComponentID;
-    this.onClickPop = this.onClickPop.bind(this);
   }
 
   render() {
     );
   }
 
-  async onClickPop() {
+  onClickPop = async () => {
     await Navigation.pop(this.props.componentId);
   }