Sort array of integers in descending and ascending order in Javascript

sort-asc.js

function sortAsc(array) {
  if (!array.length) {
    return [];
  }
  return array.splice(
    array.indexOf(
      Math.min.apply(null, array)
    ), 1)
    .concat(sortAsc(array));
}

sort-desc.js

function sortAsc(array) {
  if (!array.length) {
    return [];
  }
  return array.splice(
    array.indexOf(
      Math.max.apply(null, array)
    ), 1)
    .concat(sortAsc(array));
}