Sort odd and even

main.js

var magicSort = function(arr) {
  var temp = 0;
  
  for (var i = 0; i < arr.length; i++) {
    for (var j = 0; j < arr.length - 2; j++) {
      if (j % 2 === 0 && arr[j] < arr[j + 2]) {
        temp = arr[j];
        arr[j] = arr[j + 2];
        arr[j + 2] = temp;
      } else if (j % 2 === 1 && arr[j] > arr[j + 2]) {
        temp = arr[j];
        arr[j] = arr[j + 2];
        arr[j + 2] = temp;
      }
    }
  }
  return arr;
}

console.log(magicSort([1, 2, 5, 8, 12, 13, 16, 17]));