All major browsers (IE8+, FF3.5+, Safari 4+, any Chrome) support sessionStorage
, a JavaScript storage object that
localStorage
which is shared across all tabs).MDN Show archive.org snapshot says:
The
sessionStorage
object is most useful for hanging on to temporary data that should be saved and restored if the browser is accidentally refreshed
Example usage:
// Save data to the current session's store
sessionStorage.setItem("username", "John");
// Access some stored data
alert( "username = " + sessionStorage.getItem("username"));
As a demo, check out this jsFiddle which will assign a random number https://jsfiddle.net/8zb8p3zu/embedded/result/ Show archive.org snapshot
sessionStorage
can only store string keys and values (like localStorage
). If you need to store structured data you need to use JSON.stringify(object)
and JSON.parse(string)
.sessionStorage
is unavailable (null
) in private browsing mode on Safari and the default Android WebKit browser.sessionStorage
.window.open
will also use the same sessionStorage
.