Storage.length

The length read-only property of the Storage interface returns an integer representing the number of data items stored in the Storage object.

Syntax

var aLength = Storage.length;

Return value

An integer.

Example

The following function adds three data items to the local storage for the current domain, then returns the number of items in the storage:

function populateStorage() {
  localStorage.setItem('bgcolor', 'yellow');
  localStorage.setItem('font', 'Helvetica');
  localStorage.setItem('image', 'cats.png');

  localStorage.length; // should return 3
}

Specifications

Browser compatibilityUpdate compatibility data on GitHub

See also

• Using the Web Storage API