Object.create or new Object () in JavaScript? What's the difference between the two?

The method Object.create receives parameters. The first is required and will be used as prototype of the new object . The second is a property map with which the object is already "born."

new Object() is a longer, non-recommended way to say {} .

The three lines of code below are equivalent:

let a = {}; // legal
let b = new Object(); // coisa de dinossauros pedantes

let c = Object.create(null); // isso pode ser útil se ao invés de nulo
                             //você passar um parâmetro.

The create method can be very useful if you use some more complex logic to create your objects. Again, the two code snippets below are equivalent:

// forma verbosa
let foo = {};
foo.prototype = Array;

let bar = {nome: "john", idade: 21};

for (let propriedade in bar) {
    foo[propriedade] = bar[propriedade];
}

// forma curta
let foo = Object.create(Array, {nome: "john", idade: 21});