Javascript IIFE , Objects

Question

Please give me some link to help me understand this

    var obj = {
  a: 1
};
(function(obj) {
  obj = {
    a: 2
  };
})(obj);
console.log(obj.a);

logs out 1 whereas this

var obj = {
  a: 1
};
(function() {
  obj = {
    a: 2
  };
})();
console.log(obj.a);

logs out 2

This `function(obj)` is hiding the global variable `obj` – Ele Mar 01 '18 at 18:24 — Ele, Mar 01 '18 at 18:24
Link? http://www.google.com – Reinstate Monica Cellio Mar 01 '18 at 18:24 — Reinstate Monica Cellio, Mar 01 '18 at 18:24

score -3 · Answer 1 · edited May 19 '20 at 19:48

-3

It is because in example 1 you are creating a new name obj as a parameter and it's getting overridden instead of using the passed in value. In example 2, obj is being closed around and replaced.

edited May 19 '20 at 19:48

halfer

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answered Mar 01 '18 at 18:24

Daniel A. White

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Javascript IIFE , Objects

1 Answers1