splitn.js, a split function that returns everything after the limit in the last element.

splitn.js

export default const splitn = (s, d, n = Infinity) => {
  const a = s.split(d);
  return [
    ...a.slice(0, n - 1),
    ...(a.length >= n ? [a.slice(n - 1).join(d)] : [])
  ];
};

splitn.ts

export default const splitn = (s: string, d: string, n = Infinity) => {
  const a = s.split(d);
  return [
    ...a.slice(0, n - 1),
    ...(a.length >= n ? [a.slice(n - 1).join(d)] : [])
  ];
};