Stable Separation Sort. Move items below and above the pivot

stable-separation-sort.js

const arr = [
  14418,
  584,
  1108,
  1020,
  363,
  7073,
]

const max = Math.max(...arr)

const pivot = .3; // 30%

arr.sort((a,b) => {
  const isNormalA = a / max >= pivot;
  const isNormalB = b / max >= pivot;
  if (isNormalA === isNormalB) return 0
  if (isNormalA) return -1;
  if (isNormalB) return +1;
})