All GTM rules have an implicit event equals gtm.js. However, in some circumstances it is necessary to override this default behaviour.

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Note: dataLayer = [{“event”: “header_datalayer_loaded”}]; will trigger at the same time as event equals gtm.js

Suggested tag triggering positions:

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GTM does not currently support synchronous loading of Adsense or A/B testing tags or native tag dependencies, but it does support GA tag hitCallback, gtm.timer=1,2,3 per tag and a work-arround for daisy-chaining a sequency of events.

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