Check if a value is an object in JavaScript

Question

How do you check if a value is an object in JavaScript?

Answer 1

This will work. It is a function that returns true, false, or possibly null.

const isObject = obj => obj && obj.constructor && obj.constructor === Object;

console.log(isObject({})); // true
console.log(isObject([])); // false
console.log(isObject(new Function)); // false
console.log(isObject(new Number(123))); // false
console.log(isObject(null)); // null