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There are several methods of storing values such as sessions in JavaScript:

1. Local Storage: This is a browser feature that allows developers to store key-value pairs in the browser's memory. Local storage allows you to store data even after the user closes and reopens the browser.

2. Session Storage: Session storage is similar to local storage, but it only persists until the user closes the browser. Session storage is useful for storing temporary data that only needs to be available for a short period.

3. Cookies: Cookies are small text files that are stored on the client-side. Cookies can be used to store session data such as user preferences, login credentials, and shopping cart items.

4. IndexedDB: IndexedDB is an API that allows developers to store data in key-value pairs on the client-side. IndexedDB is a powerful storage option that can store large amounts of data and is useful for offline web applications.

5. Web Storage API: The Web Storage API is a specification that encompasses local storage and session storage. The API provides a simple interface for storing and retrieving data on the client-side.