function stringBreakers(n, string) {
  string = string.replace(/\s/g, '');

  let resultStr = '';

  for (let i = 0; i < string.length; i += n) {
    resultStr += string.slice(i, i + n);
    if (i + n < string.length) resultStr += '\n';
  }
  return resultStr;
}


stringBreakers(5, tempstr);

function stringBreakers(n, string){
  let result = '';
  let counter = 0;
  for (const letter of string) {
    if (letter === ' ') continue;
    if (counter === n) {
      result += '\n';
      counter = 0;
    }    
    result += letter
    ++counter;
  }
  return result;
}

stringBreakers(5, tempstr);

function stringBreakers(n, string) {
  const parts = [];
  const str = string.replace(/\s/g, '');

  const breakString = (s) => {
    const firstPart = s.slice(0, n);
    const secondPart = s.slice(n, string.length);

    parts.push(firstPart);
    
    if (secondPart.length > n) {
      breakString(secondPart);
    } else {
      parts.push(secondPart);
    }
  }
  
  breakString(str);

  return parts.join('\n');
}

stringBreakers(5, tempstr);

function stringBreakers(n, string) {
  let arr = string.replace(/\s+/g, '').split('');

  for (let i = 1; i * (n + 1) <= arr.length; i++) {
    arr.splice(i * (n + 1) - 1, 0, '\n');
  }

  return arr.join('');
}

stringBreakers(5, tempstr);

function stringBreakers(n, s){
  return s.replace(/\s/g,'').replace(new RegExp('.{'+n+'}','g'),'$&\n').trim()
}

stringBreakers(5, tempstr);