How to "instanceof" a primitive string (string literal) in JavaScript [duplicate]

Question

In JavaScript, I can declare a string in the following ways;

var a = "Hello World"; var b = new String("Hello World"); 

but a is not an instance of String...

console.log(a instanceof String); //false; console.log(b instanceof String); //true; 

So how do you find the type or "instanceof" a string literal?

Can JavaScript be forced to create a new String() for every string literal?

Answer 1

use typeof "foo" === "string" instead of instanceof.

Answer 2

Use typeof instead and just compare the resulting string. See docs for details.