When called on a form element, localStorage is used to remember the values that have been input up to the point of either saving or unloading. (closing window, navigating away, etc.) If localStorage isn’t available, nothing is bound or stored.
By default, the plugin looks for an element with a class of remember_state within the form to show a note indicating there is stored data that can be repopulated by clicking on the anchor within the remember_state container. If the element doesn’t exist, it is created and prepended to the form. You can override the selector and the HTML that is prepended in the options object you pass to the plugin.
