Javascript IF statement, detecting null not working

Question

I have a null variable that is behaving weird. For some reason I can't seem to detect whether or not it is null! The var is called emailFromUrl.

   console.log(emailFromUrl); //returns null
   console.log(emailFormUrl.toString()); //returns null
   console.log(emailFromUrl === null); //false!
   console.log(emailFromUrl != null); //true!
   console.log(typeof emailFromUrl); //string
   console.log(!emailFromUrl); //false!
   console.log(emailFromUrl === ""); //false

What the heck is going on here?

The answer:

   console.log(emailFromUrl === 'null'); //true!

The unfiltered console log:

Test71 | emailFromUrl : null | emailFromUrl === null : false | emailFromUrl != null : true | emailFromUrl.toString() : null | typeof emailFromUrl : string | !emailFromUrl : false | emailFromUrl === "" : false | emailFromUrl === "null" : true

Answer 1

Perhaps emailFromurl value is just a literal null string? ) That will explain all the results you get in your question, I think.

Answer 2

well the === operator checks the value and type. emailFromUrl is of type string not null which it why it evaluates to false there.