Split

//japanfever variant E3839EE383AAE382AAE9B3A9E38388E383ACE383AD

function split1(str, del) {
  let arr = [];
  let piece = "";
  for (let i = 0; i < str.length; i++) {
    let j = 0;
    while (j < del.length && (i + j) < str.length && str[i + j] == del[j]) j++;
    if (j == del.length) {
      arr.push(piece);
      piece = "";
      i += j - 1;
    } else {
      piece += str[i];
    }
  }
  arr.push(piece);
  return arr;
}