浏览器处理cookie

function setCookie(options) {
  const { name, data } = options;
  const age = options.age || 24 * 3600000;
  const domain = options.domain || window.location.hostname;
  document.cookie = `${name}=${data}; path=/; max-age=${age}; domain=${domain}`;
}

function getCookie(cookie_name) {
  let value = null;
  let allcookies = document.cookie;
  let cookie_pos = allcookies.indexOf(cookie_name);
  if (cookie_pos != -1) {
    cookie_pos = cookie_pos + cookie_name.length + 1;
    let cookie_end = allcookies.indexOf(";", cookie_pos);
    if (cookie_end == -1) {
      cookie_end = allcookies.length;
    }
    value = unescape(allcookies.substring(cookie_pos, cookie_end));
  }
  return value;
}