CrossStorage - localStorage that can be used in a cross domain

One of the APIs added in HTML 5 is localStorage. It is a simple storage that can be used within a specific site, but it is difficult to use only at one site. Sometimes you may want to use another site (especially subdomain).

I would like to use CrossStorage there. It is storage that can be used in cross domain.

How to use CrossStorage

I am using it. You can use localStorage in external domain.

Also from another domain.

CrossStorage requires one domain to become a hub. You can specify the domains that can be accessed, and you can set further permissions. And from the external domain it is a mechanism to exchange messages using iframes. The principle is simple but interesting.

CrossStorage is JavaScript open source software (Apache Licnese 2.0).

zendesk/cross-storage: Cross domain local storage, with permissions