JavaScriptCookies gửi kèm mọi HTTP request (có thể dùng HttpOnly để ngăn JS access, Secure cho HTTPS only). LocalStorage/sessionStorage chỉ accessible qua JS, không gửi với requests.
Cookies cho session, auth tokens. LocalStorage cho user preferences, cache. Tránh lưu sensitive data trong localStorage vì XSS.
Cookies are sent with every HTTP request (can use HttpOnly to prevent JS access, Secure for HTTPS only). localStorage/sessionStorage are only accessible via JS and not sent with requests.
Cookies are for sessions and auth tokens. localStorage is for user preferences and caching. Avoid storing sensitive data in localStorage due to XSS risks.