"instanceof" of a String object vs that of "string" literals

Asked Apr 04 '12 at 18:59

Active Apr 04 '12 at 18:59

Viewed 96 times

Possible Duplicate:
Why does instanceof return false for some literals?

Does anyone know why x is not a instance of String/Object here?

var x = "abc",
y = new String("XYZ");

x instanceof String; // False
x instanceof Object; // False
y instanceof String; // True
(x.constructor === y.constructor) //True

http://jsfiddle.net/pCfWC/6/

edited May 23 '17 at 12:11

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asked Apr 04 '12 at 18:59

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Yep: http://stackoverflow.com/a/203757/15031 Asked a [similar question](http://stackoverflow.com/q/203739/15031) a while back. :) – Jonathan Lonowski Apr 04 '12 at 19:00
http://stackoverflow.com/questions/203739/why-does-instanceof-return-false-for-some-literals – Eugene Retunsky Apr 04 '12 at 19:02

"instanceof" of a String object vs that of "string" literals

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