fetch a cookie with a key of "username"

fetchCookie.js

const fetchCookie = () => {
  const name = "username" + "=";
  const cookie_array = document.cookie.split(';');
  for(let i = 0; i < cookie_array.length; i++) {
      let c = cookie_array[i];
      if (c.indexOf(name) == 0) {
          return c.substring(name.length, c.length);
      }
  }
  return "";
}