splitnum.js

const splitTotal = (total, n) => {
  let arr = [];
  let i = 0;
  while (i < n) {
    arr.push(Math.floor(Math.random() * total) + 1)
    i++;
  }
  const sorted = [0].concat(arr, [total]).sort((a, b) => a - b);

  let out = [];
  for (i = 0; i < sorted.length - 1; i++) {
    out.push(sorted[i+1] - sorted[i]);
  }
  return out
}