Check if a value is an object in JavaScript

Question

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

Answer 1

Here's an answer with optional chaining, and perhaps the smallest isObj function for this question.

const isObj = o => o?.constructor === Object;

// True for this
console.log(isObj({}));        // object!

// False for these
console.log(isObj(0));         // number
console.log(isObj([]));        // array
console.log(isObj('lol'));     // string
console.log(isObj(null));      // null
console.log(isObj(undefined)); // undefined
console.log(isObj(() => {}));  // function
console.log(isObj(Object));    // class