Undefined variable prints null

Ionic Framework ionic-v3
1 
///page.ts
this.dataPackage ={};

///page.html
<div> This is the {{dataPackage.Variable1}} value.

OR

<div> This is the {{dataPackage?.Variable1}} value.

this statement result is correct (as expected) in desktop chrome but android browser shows:

 This is the null value;

How can prevent printing null text?