Constructor for null and undefined

Question

Of the five primitive JavaScript data types (string, number, boolean, null and undefined), the first three have associated constructors:

new String("Hello!")
new Number(40)
new Boolean(true)

The constructed objects are wrappers for the object literals. In particular, new String("Hello!") === "Hello!" evaluates to false.

Are there a similar constructors for the null and undefined primitive data types that produce object wrappers different from the corresponding object literal?

Answer 1

No, there are not, and it wouldn't make sense considering the "values" they represent.

Ignore the fact that typeof null === 'object'

According to MDN:

JavaScript automatically converts primitives and String objects, so that it's
possible to use String object methods for primitive strings.

The interpreter just does some magical auto-wrapping of primitive in classes if you call a method that affects the primitive, like charAt.