Using external session identifiers

Nosto uses a cookie to identify browsers between their visits to the site. The purpose and usage of this cookie is very similar to how web analytics tools, such as Google Analytics, work.

Each session is identified using a randomly generated 24-character secure string and persisted in 2c.cId cookie.

For privacy reasons, if you have the need to disallow any third-party tracking cookies, this feature can be used to achieve that.

This feature will not remove previously set 2c.cId cookies and will only affect sessions from the time of implementation onward.

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Changing the way sessions are handled

You can opt-out of tracking by using the setCustomerIdentifierService method.

Assuming that your platform has a method called platform.getSID() that returns the current session identifier as offered by your platform - you would use:

nostojs((api) => {
  api.visit.setCustomerIdentifierService({
    getCustomerId: () => {
      return platform.getSID()
    },

    setCustomerId: id => {
      // Do nothing as you do not want to overwrite
      // the session identifier.
    }
  })
});

To showcase, the flexibility offered by this API - the following example simply uses LocalStorage (instead of cookies) to persist the session identifier.

nostojs((api) => {
  api.visit.setCustomerIdentifierService({
    getCustomerId: () => {
      // Fetch the customer from to the LocalStorage
      // or return null if there is none i.e. a new
      // session
      return localStorage.getItem('my_nosto_id')
    },

    setCustomerId: id => {
      // Save the returned customer identifer to the
      // LocalStorage. 
      localStorage.setItem('my_nosto_id', id);
    }
  })
});