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browser-storage

Both localStorage and sessionStorage are web storage APIs provided by modern browsers to store key-value pairs locally in the user's browser. They are similar in usage but differ primarily in their lifespan and scope:

  1. Lifespan:

    • localStorage: Data stored in localStorage persists indefinitely, even after the browser is closed and reopened. It remains stored until explicitly deleted by the user or cleared through JavaScript.
    • sessionStorage: Data stored in sessionStorage is available only for the duration of the page session. It is cleared when the page is closed, including tabs and windows.

  2. Scope:

    • Both localStorage and sessionStorage are scoped to the same origin (domain, protocol, and port). Data stored in one tab or window is accessible in another tab or window if they share the same origin.

  3. Usage:

    • Both APIs provide simple methods (setItem, getItem, removeItem, clear) for storing and retrieving data synchronously.

  4. Use Cases:

    • localStorage is useful for persisting user preferences, login tokens, and other data that should persist across sessions.
    • sessionStorage is useful for storing temporary data that is relevant only for a particular session, such as data used in a multi-step form or transient state information.