Why Hasownproperty Returns True

This question is an extension of Can't understand the behavior of deleting vars in JavaScript This is happening on Google Chrome:- CASE 1: var x = 5; window.x === x // true. x, as

Solution 1:

Let me to use my answer:

You create variable in global scope by var, not property of window object. This var is just linked to window.x. And then you compare window.x === x it will return true.

Also object.hasOwnProperty(x) check what object has x as property (via object.x) not x from prototype chain.