How can I determine whether an array is a prototype?

Question

Checking is a value is an array is straight forward in JavaScript:

Array.isArray(value);

However, I need to distinguish between a value that is an array and a value that is andarray and also an array prototype. For instance:

Array.isArray([]); // true
Array.isArray(Object.getPrototypeOf([])); // true, but need false

Unfortunately the prototype of arrays is also type array, which is why Array.isArray returns true in this example.

If anyone knows how I can differentiate between the two (test for arrays, but not array prototypes) it would be greatly appreciated.

Answer 1

console.log([] instanceof Array) // true

console.log(Object.getPrototypeOf([]) instanceof Array) // false