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Implement tag manager for LIFF in the design doc.
This PR replaces
gtag
withdataLayer.push()
. After events and variables are pushed to Google Tag Manager'sdataLayer
, tag settings in Tag Manager takes over and submits events to Universal Analytics and GA4.See code changes to README for list of events and variables pushed to
dataLayer
.Note that although we removed
GA_ID
from.env.sample
in this PR, it is still used byuniveral-analytics
in webhooks. Will remove in the future.Tag Manager tags
Universal analytics
ViewArticle
andViewReply
events; backward compatible.GA4
view_item
event with article and replies