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I think 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

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

I think this would work. Function that returns true or false, possibly null.

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

isObject({}) // true
isObject([]) // false
isObject(new Number(123)) // false
isObject(null) // null

I think 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

I think this would work. Function that returns true or false, possibly null.

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

isObject({}) // true
isObject([]) // false
isObject(new Number(123)) // false
isObject(null) // false

I think this would work. Function that returns true or false, possibly null.

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

isObject({}) // true
isObject([]) // false
isObject(new Number(123)) // false
isObject(null) // null