What kind of information should never be stored in Client variables?

Client variables are designed for temporary data storage that persists while a user is interacting with the application. However, they should not be used to store sensitive or confidential information.

Passwords, in particular, should always be handled with a high level of security, as they grant access to user accounts and sensitive data. Storing passwords in client variables poses a significant risk, as this data can be easily accessed by unauthorized parties. In contrast, user preferences, session data, and display settings are generally less sensitive and can be stored in client variables without exposing the user to security risks.

It's crucial to maintain best practices around data security by ensuring that any sensitive information, especially passwords, is kept secure and stored in a manner that limits exposure to potential breaches.