Storage length Property

Get the number of local storage item for this domain:

var x = localStorage.length;

Description

The length property returns the number of items stored in the browsers Storage Object, for this particular domain..

The length property belongs to the Storage Object, which can be either a localStorage object or a sessionStorrage object.

Property
length	4	8	3.5	4	10.5

localStorage.length;

Or:

sessionStorage.length;

DOM Version:	Web Storage API
Return Value:	A Integer, representing the number of stored items

The same example, but using session storage instead of local storage.

Get the number of session storage item for this domain:

var x = sessionStorage.length;

Loop through each local storage item and display the names:

for (i = 0; i < localStorage.length; i++) {
x = localStorage.key(i);
document.getElementById("demo").innerHTML += x;
}