const func1 = function (...arguments) {
  console.log(arguments)
}
const func2 = (...arguments) => {
  console.log(arguments)
}

const func3 = function (a, b) {
  console.log(arguments)
}
const func4 = (a, b) => {
  console.log(arguments)
}

func1("foo", "bar") // ["foo", "bar"]
func2("foo", "bar") // ["foo", "bar"]
func3("foo", "bar") // { 0: "foo", 1: "bar"}
func4("foo", "bar") // arguments is not defined