JavaScript Snippet for Deleting Cookies

deleteCookiesWhitelist.js

/**
 *
 * WARNING / DISCLAIMER:
 * ----------------------
 * This snippet is intended solely as guidance for implementing cookie deletion.
 * It does NOT constitute a recommendation in any form.
 * Consider the compliance, privacy, and UX implications for your environment
 * before using it, and ensure transparency in your data handling practices.
 *
 * This is not functionality that any vendor tool provides. 
 * The following code is for example purposes only. 
 * Support teams cannot assist with implementing this functionality.
 *
 * HOW IT WORKS:
 * - You define a whitelist of cookies that should NOT be deleted.
 * - All other cookies will be deleted from the current domain and subdomains.
 */

(function deleteAllCookies() {
  // ✏️ Customize this list of cookies you want to KEEP
  const whitelist = ["session_id", "csrftoken"];

  const cookies = document.cookie.split(';');
  const domainParts = location.hostname.split('.');

  cookies.forEach(cookieStr => {
    const cookieName = cookieStr.split('=')[0].trim();

    // Skip if cookie is whitelisted
    if (whitelist.includes(cookieName)) {
      console.log(`[SKIP] ${cookieName} is whitelisted`);
      return;
    }

    // Delete with multiple strategies
    document.cookie = `${cookieName}=; Max-Age=0; path=/;`;
    document.cookie = `${cookieName}=; expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/;`;

    // Try deleting across domain permutations
    let parts = [...domainParts];
    while (parts.length > 0) {
      const domain = '.' + parts.join('.');
      document.cookie = `${cookieName}=; expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/; domain=${domain};`;
      parts.shift();
    }

    console.log(`[DELETE] ${cookieName}`);
  });

  console.log(`[deleteAllCookies] Processed ${cookies.length} cookies.`);
})();