[CodeWars] Consecutive strings

Consecutive strings

function longestConsec(strArr, k) {
  const n = strArr.length;
  let currentLongStr = '';

  if (n === 0 || k > n || k <= 0) {
    return '';
  }

  for (let i = 0; i < n; i++) {
    const loopStr = strArr.slice(i, k + i).join('');
    if (loopStr.length > currentLongStr.length) {
      currentLongStr = loopStr;
    }
  }
  return currentLongStr;
}