// source https://jsbin.com/gavovuh

index.html

<script id="jsbin-javascript">
//What is the output?

var hero = {
  _name: 'Amin Elhasan',
  getSecretIdentity: function()
  {
    return this._name;
    
  }
};

var stoleSecretIdentity = hero.getSecretIdentity;

console.log(stoleSecretIdentity());
console.log(hero.getSecretIdentity());
</script>

jsbin.gavovuh.js

//What is the output?

var hero = {
  _name: 'Amin Elhasan',
  getSecretIdentity: function()
  {
    return this._name;
    
  }
};

var stoleSecretIdentity = hero.getSecretIdentity;

console.log(stoleSecretIdentity());
console.log(hero.getSecretIdentity());