Element access to localStorage. The "name" property is the key to the data ("value" property) stored in localStorage.
iron-localstorage automatically saves the value to localStorage when
value is changed. Note that if value is an object auto-save will be
triggered only when value is a different instance.
<iron-localstorage name="my-app-storage" value="{{value}}" on-iron-localstorage-load-empty="initializeDefaultValue"></iron-localstorage>