如何从JS for循环中获取数组？

var arr = [1, 2, 3, 4, 5];
for (var i = 0; i < arr.length; i++) {
  console.log(arr[i]);
}

var arr = [1, 2, 3, 4, 5];
for (var element of arr) {
  console.log(element);
}

var arr = [1, 2, 3, 4, 5];
arr.forEach(function(element) {
  console.log(element);
});