https://gist.github.com/romabelka/8bb8ef40e9e991ea1728eb8105c57cb2

task WIX

function solution(fullMesssage, maxLength) {
  const space = ' ';
  const wordsArr = fullMesssage.split(space);
  
  const isSomeWordOutOfBoundary = Boolean(
    wordsArr.some(word => word.length > maxLength)
  );
  if (isSomeWordOutOfBoundary) {
    return -1;
  }
  
  const resultedMessagesArr = [];
  let currentMessage = '';

  wordsArr.forEach((word, index) => {
    const resultedMessage = (currentMessage + space + word).trim();
    const resultedMessageLength = resultedMessage.length;

     if (resultedMessageLength < maxLength) {
      currentMessage = resultedMessage
    } else if (resultedMessageLength > maxLength) {
      resultedMessagesArr.push(currentMessage);
      currentMessage = word;
    } else { 
      resultedMessagesArr.push(resultedMessage);
      currentMessage = '';
    }
  })

  if (currentMessage.length) {
    resultedMessagesArr.push(currentMessage);
  }

  return resultedMessagesArr.length;
}