Check if an object is an object literal or bare object

is-plain-object.js

function isPlainObject(value) {
    if (!value || typeof value !== 'object') {
        return false;
    }
    const prototype = Object.getPrototypeOf(value);
    return prototype === null || prototype === Object.getPrototypeOf({});
}

// Usage:

isPlainObject({}); //=> true
isPlainObject(new Object()); //=> true
isPlainObject(Object.create(null)); //=> true