JavaScript: var name is not undefined?

Question

var name;
console.log(name === undefined); // returns false

Why is this? Isn't name supposed to be undefined since no value has been assigned to it?

If I try the same for, let's say, var asd; it will assign it to be undefined. Is name a special keyword or something?

Thank you.

http://stackoverflow.com/questions/5515310/is-there-a-standard-function-to-check-for-null-undefined-or-blank-variables-in — Arpan, Jun 04 '16 at 21:57
This is a duplicate (although I cannot find the specific question for this specific issue) - it's an odd "edge case" of `var name` in *global scope*, as `var` does not declare a new variable in that context. — user2864740, Jun 04 '16 at 21:58
https://stackoverflow.com/questions/28029234/why-global-variable-name-changes-to-string — Bergi, Jun 04 '16 at 22:00
@Bergi thanks for the link. I did looked up my question on stackoverflow but did not find that thread. — Nikolay, Jun 04 '16 at 22:02
@Arthlete: Well I knew that I had to search for "window.name" :-) — Bergi, Jun 04 '16 at 22:07

score 1 · Accepted Answer · answered Jun 04 '16 at 21:57

1

In the global scope of the browser name is a property of Window object.

answered Jun 04 '16 at 21:57

PM 77-1

1 Answers1