isObject

is-object.ts

const isObject = (obj?: unknown): obj is object =>
    Boolean(obj) && (obj?.constructor === Object);

console.log(isObject()); // false
console.log(isObject(null)); // false
console.log(isObject(true)); // false
console.log(isObject(1)); // false
console.log(isObject('str')); // false
console.log(isObject([])); // false
console.log(isObject(new Date)); // false
console.log(isObject(() => { })); // false
console.log(isObject(function() { })); // false
console.log(isObject({})); // true