https://twitter.com/nanaya_a/status/801127413170065408

split.js

function f(str, seperator, limit) {
  // split string by limit
  // .split eventually add one more elements.
  let arr = str.split(seperator, limit);

  if(typeof limit === "number") {
    // find last element's index, push it to the original array
    let index = arr.reduce(function(prev, curr, i){
      return str.indexOf(curr, prev);
    }, 0);
    arr.pop();
    arr.push(str.substring(index));
  }
  return arr;
}