(4 kyu) IP Validation.js

const isValidIP = (str) => {
  const ip = str.split`.`;

  if (
    ip.length !== 4 ||
    ip.filter(
      (x) =>
        x > 255 ||
        (!+x && x !== '0') ||
        x.trim().length !== x.length ||
        (x[0] === '0' && x !== '0'),
    ).length
  )
    return false;

  return true;
};