Analytics.js tries to detect when a page is about to be closed and saves pending events to`localStorage`. When the user navigates to another page within the same domain, Analytics.js attempts to send any events it finds in localStorage.

When`disableClientPersistence` is set to`true`, Analytics.js won't store any pending events into`localStorage`.

To access or assign a value to a cookie, outside of the standard Segment methods (track/identify/page/group), you can use the following methods. To access the cookie's value pass an empty`()` at the end of the method. To assign the value, include the string value inside those parenthesis`('123-abc')`. To clear (remove) the value for a specific field, pass in an empty value of its type, for string`('')`, for object`({})`.

| Field| Cookie Name| Analytics.js Method| Local Storage Method| Set Example| Clear Example|

| -----| -----------| -------------------| --------------------| ---------------| -------------|