HTML5 Local storage vs. Session storage

The only difference is that localStorage has a different expiration time, sessionStorage will only be accessible while and by the window that created it is open.
localStorage lasts until you delete it or the user deletes it.
Lets say that you wanted to save a login username and password you would want to use sessionStorageover localStorage for security reasons (ie. another person accessing their account at a later time).
But if you wanted to save a user's settings on their machine you would probably want localStorage. All in all:

localStorage - use for long term use.
sessionStorage - use when you need to store somthing that changes or somthing temporary

3 years ago

sessionStorage maintains a separate storage area for each given origin that's available for the duration of the page session (as long as the browser is open, including page reloads and restores)

localStorage does the same thing, but persists even when the browser is closed and reopened.

3 years ago