HBMP Cross-Frame — Railway Showcase

Prod-build cross-frame scenarios. All scenarios are same-origin on this Railway deployment.

Scenarios

Scenario A — Host + iframe Worker
Host page wins CORE via Web Locks election; one iframe loads block.html as WORKER.
Scenario B — iframe Core + iframe Worker
Thin host (no wrapper, no GPT); two iframes race for CORE/WORKER via Web Locks.
Scenario C — Host + FIF Worker
Host page is CORE; about:blank FIF worker injected via contentDocument.write().

Refresh params accepted by all scenarios:
?rcInterval=5000&rcWithDFP=1&rLimit=3&refreshInterval=10000&buyersInRefresh=all&fif=1

Presentations