“Javascript de vírgula à direita” Respostas de código

Javascript de vírgula à direita

Trailing comma is allowed in an array, object and function parameters. 
Now, this isn’t huge but it’s nice if in case we forget to close off or 
rather end a comma if we’re listing a bunch of items it doesn’t matter 
if we include that final extra one.

var list = [
    "one",
    "two",
    "three",   // It is valid
];

var obj = {
    one: "1",
    two: "2",
    three: "3", //  It is valid
}

function add(
    one,
    two,
    three, // It is valid
) {}