AppMeasurement determines its cookie location by looking at the domain and domain suffix. For domains like
example.com, AppMeasurement sets cookies in the correct location. However, for other domains like
example.co.uk, AppMeasurement can mistakenly set cookies on
co.uk. Most browsers reject cookies set on this invalid domain, causing issues with visitor identification.
cookieDomainPeriods variable helps AppMeasurement determine where Analytics cookies are set by calling out that the domain suffix has an extra period in it. This variable allows AppMeasurement to accommodate the extra period in the domain suffix and set cookies in the right location.
www.example.com, this variable does not need to be set. If needed, you can set this variable to
www.example.co.jp, set this variable to
Do not take subdomains into account for this variable. For example, do not set
cookieDomainPeriods on the example URL
store.toys.example.com. AppMeasurement by default recognizes that cookies should be stored on
example.com, even on URLs with many subdomains.
Domain Periods is a field under the Cookies accordion when configuring the Adobe Analytics extension.
Set this field to
3 only on domains containing a period in its suffix. Otherwise this field can be left blank.
cookieDomainPeriods variable is a string that is typically set to
"3", only on domains that contain a period in its suffix. Its default value is
"2", which accommodates most domains.
// Manually set cookieDomainPeriods for domains with a period in its suffix, such as www.example.co.uk s.cookieDomainPeriods = "3"; // Detect if a URL has a domain suffix with an extra period, and set s.cookieDomainPeriods automatically document.URL.indexOf(".co.") > 0 ? s.cookieDomainPeriods = "3" : s.cookieDomainPeriods = "2";