How does one check if a javascript variable is referenced, and from where?

Question

JS does not have public/private variables, but everything is accessible from pretty much anywhere.

Is it possible to check what other variables reference another variable?

var firstVar = "Hello";
someObject.secondVar = firstVar;
checkReferences(someObject.secondVar);

=> firstVar

Or something along these lines.

You can't access variables from everywhere. It depends on the scope of the variable. — putvande
– putvande, Commented Nov 20, 2013 at 15:32
No, but you are freer than in many other languages. Not everywhere, but pretty much. — Martin Josefsson
– Martin Josefsson, Commented Nov 20, 2013 at 15:34

Matthew Rapati · Accepted Answer · 2013-11-20 15:34:50Z

2

someObject.secondVar would have the same value as firstVar, but it doesn't reference it. If you change the value of one, it won't change the value of the other.

answered Nov 20, 2013 at 15:34

Matthew Rapati

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Community · Accepted Answer · 2017-05-23 11:50:16Z

0

Sorry for asking a question I was close to finding out the answer to.

I should have asked whether or not JS passes by reference or value. It's by value, until you pass Objects {}. So the question does not really make sense.

This answer is good reading for anyone who was wondering the same as me

edited May 23, 2017 at 11:50

CommunityBot

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answered Nov 20, 2013 at 15:38

Martin Josefsson

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