Read on below the fold for:
- State storage strategy
- Opt-out cookie
- Better form tracking for passwords
- New OptimizelyX and Parrable contexts
- Extracting valuable metadata from the tracker
- Improved page activity handling
- Documentation and help
1. State storage strategy
This release introduces the
stateStorageStrategy property to the
tracker configuration, taking one of four values:
cookieAndLocalStorage value (the default) will follow the same behavior
than the previous versions of the tracker: the id and session data will be
stored in cookies (similar to if you had set
useCookies to true or left
it unspecified) and outgoing events will be buffered in local storage
(previously controlled using
cookie value will store the id and session data in
cookies. However, outgoing events won’t be buffered in local storage.
localStorage value will store those two first-party cookies in local
storage. This approach is recommended if you are reaching the maximum HTTP
header size of 4kb present on most servers. The outgoing event buffer will
continue to use local storage.
The last possible value is
none. In this case, nothing will be stored,
neither in cookies nor in local storage. This is equivalent to setting the old
useLocalStorage settings both to false.
This table recaps everything said so far:
|stateStorageStrategy||location of the id and session data||outgoing events buffered?|
useCookies argmap parameters have been made
redundant by the introduction of
stateStorageStrategy, they’ve been
2. Opt-out cookie
Similar to the Do Not Track option, we’re introducing a way to set an opt out cookie. If this cookie is set, no tracking will be performed.
You can set this cookie with:
where ‘opt-out’ is the name of your opt-out cookie.
3. Better form tracking for passwords
Thanks to the work of Snowflake Analytics’ Mike Robins, as of this release password fields in forms won’t be auto-tracked.
4. New OptimizelyX and Parrable contexts
4.1 Parrable context
Parrable is a device identification platform which lets you idenitfy devices across browser and apps without personally identifiable information. This release introduces support for a Parrable context which will keep track of this identifier.
You can also have a look at the JSON Schema for the Parrable context.
There are further setup steps required to make use of Parrable data in the Snowplow pipeline; we will provide a tutorial for this soon.
4.2 OptimizelyX context
You can enable this context like any other:
The schema for this context is available in Iglu Central.
If you are planning on leveraging the context’s
variationNames, please untick ‘Mask descriptive names in project code
and third-party integrations’ in the OptimizelyX menu -> Settings -> Privacy.
Otherwise, all variation names will be
Thanks to Snowflake Analytics’ Mike Robins for adding the support for OptimizelyX.
5. Extracting valuable metadata from the tracker
In an effort to give you more control, we’ve exposed a few properties internal to the tracker such as cookie names, page view IDs and domain session indices.
The recommended way of retrieving these data points is via a tracker callback, which prevents problems if the tracker hasn’t finished loading.
The following examples assume you have configured a tracker in the following way:
For example, you can retrieve the complete cookie name for the domain cookie like so:
Where ‘id’ is the basename of the cookie you want to retrieve. Here it is the basename of the domain cookie, the basename for the session cookie being ‘ses’. The returned value should be made of the cookie prefix (the ‘cookieName’ tracker configuration option, which defaults to ‘sp’), its basename as well as a suffix based on a hash of the cookie domain.
Same goes for the page view ID:
And the domain session index:
If you have any other suggestions for tracker data that we should expose via
get() methods, please add these to issue 548 in GitHub.
6. Improved page activity handling
In this release, we are also allowing external triggering of the
activityHandler. This was motivated by the fact that some events do not
trigger the activity handler despite the user being engaged (e.g. while watching
You can trigger the activity handler yourself with:
This use case and the accompanying implementation was contributed by Dean Collins, many thanks Dean!
A few improvements have also been made “under the hood” to activity tracking in general.
Activity tracking is now disabled if you don’t supply integers to
This is a safety feature, as corrupt non-integer arguments could cause a relentless loop of back-to-back page pings (see issue #572 for more
The tracker is available to use here:
There are no breaking API changes introduced with this release, but the following options in the configuration argmap have been deprecated and will fire warnings:
Please migrate these to the new
stateStorageStrategy parameter as detailed above.
If you enable the OptimizelyX context, you will need to deploy the following table to your Redshift cluster: com.optimizely.optimizelyx/summary_1.sql.
If you enable the Parrable context, you will also need to update the configuration of your Snowplow pipeline to make best use of this. A tutorial on doing this will follow soon.
8. Documentation and help
The v2.8.0 release page on GitHub has the full list of changes made in this version.