Make parameters optional, when not set they are now 'undefined'

PiwikPRO / server-side-template-for-gtm

Piwik PRO Analytics template for server-side Google Tag Manager

Apache License 2.0

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Make parameters optional, when not set they are now 'undefined' #4

Open endgameapp opened 2 years ago

endgameapp commented 2 years ago

Currently all parameters are set in a way that when they are empty you will send 'undefined'. It is better to make all parameters optional that are truly optional.