no value 30% OFF Memorial Day w/e - Chicago Sailboat Charters What this gets you immediately When the iframe updates to /sail-details/?page=1... → parent gets booking_details_view When it updates to /booking/?Page=2... → parent gets booking_payment_view Then we add the success detector once you capture the post-payment URL or success DOM marker. 2) Parent side: receive the message and fire GA4 events centrally Add this to the marketing site (parent) via GTM Custom HTML (All Pages on booking page):

30% OFF Memorial Day w/e

Check pricing and availability and Book online where all charters are 30% OFF Memorial Day w/e to kick off our season.

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