Problem
Flexible creatives, especially APS, can report 1×1 through GPT slotRenderEnded.size even when the publisher-visible slot is larger after rendering. Operators need to distinguish the requested slot formats, GPT’s reported fill size, and outer-slot layout geometry.
Proposed behavior
- Preserve the full configured size list Trusted Server supplied to GPT for the correlated request.
- Preserve GPT’s
slotRenderEnded.size as the reported fill-size fact.
- For uniquely bound, connected, filled slots, record and display the observed outer CSS slot box after render.
- Keep the observed box updated on resize when supported.
- Reject measurements for ambiguous, unbound, empty, or stale refresh cycles.
- Export all three values and document that cross-origin/SafeFrame content cannot be measured internally.
Acceptance criteria
ts_console displays the complete requested size list, GPT-reported fill size, and an optional observed outer slot box.- A GPT-reported
1×1 and a distinct observed outer box are visible together.
- Delayed measurements cannot update a newer request cycle.
- No APS sandbox or creative-iframe access is added.
Problem
Flexible creatives, especially APS, can report
1×1through GPTslotRenderEnded.sizeeven when the publisher-visible slot is larger after rendering. Operators need to distinguish the requested slot formats, GPT’s reported fill size, and outer-slot layout geometry.Proposed behavior
slotRenderEnded.sizeas the reported fill-size fact.Acceptance criteria
ts_consoledisplays the complete requested size list, GPT-reported fill size, and an optional observed outer slot box.1×1and a distinct observed outer box are visible together.