Is there a clever way to access a variable inside a wrapped function?

Question

var x=(function(){var u=1;})();

console.log(x.u); // undefined

Is there any way at all to ether get, access or eventually console.log u?

Is there any code I could put inside x that might make u vulnerable / accessable from the outside?

Edit: I mean without returning u "directly". Is there any way of accidentally exposing u?

Answer 1

Short answer: No. Private is private is private.

Slightly longer answer: Javascript does not protect from poorly conceived or executed coding, accidentally missing the var or returning or setting a property accessor in an object (this.u = 1;) (or accessing a variable in a subscope*), or weak coffee.

When used correctly with good understanding, exposing local/private variables within a scope must be done with some kind of intention. If there is some magic voodoo that can expose your precious variable, I have not seen it. (Does the absence of evidence prove or disprove whether the yeti stalks this earth?!?)

This includes, but is not limited to:

• Marauding aliens
• Twerking Miley Cyrus
• The Pope (be careful of the confessional, loose lips...)
• Fat Albert
• The Tea Party
• Austin Power's cat
• Nihilists
• Moops
• Baby rhinos
• El Yeti, née, Hefe

Et cetera, et cetera.

_{* Gunmen on the grassy noll?}

Answer 2

No, there is no way. After the function has been executed, there is no variable left, that has a reference to the value of u. Thus, the value of u will get garbage collected and will be lost.