HandleCookies.js

// Usage: getCookie('cookie-name', ctx.req.headers.cookie)

export function getCookie(cname, cookieSourceString = "") {
  if (typeof window !== "undefined") {
    // eslint-disable-next-line no-param-reassign
    cookieSourceString = document.cookie;
  }
  const name = cname + "=";
  const decodedCookie = decodeURIComponent(cookieSourceString);
  const ca = decodedCookie.split(";");
  for (let i = 0; i < ca.length; i++) {
    let c = ca[i];
    while (c.charAt(0) === " ") {
      c = c.substring(1);
    }
    if (c.indexOf(name) === 0) {
      return c.substring(name.length, c.length);
    }
  }
  return "";
}