Explainer update for cross-origin automatic beacon data support. #1386
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| To opt in the data, the dictionary passed into `setReportEventDataForAutomaticBeacons` takes an optional `crossOriginExposed` boolean that defaults to false. If set to true, the automatic beacon data can be used if a cross-origin document wants to send an automatic beacon and is opted in. A document will use the data of the first ancestor frame that has automatic beacon data registered for the event type being sent. | ||
| A cross-origin document opts in by being served with the response header `Allow-Fenced-Frame-Automatic-Beacons: true`. | ||
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| To use data for cross-origin automatic beacons, the dictionary passed into `setReportEventDataForAutomaticBeacons` takes an optional `crossOriginExposed` boolean that defaults to false. If set to true, the automatic beacon data can be used if a cross-origin document wants to send an automatic beacon and is opted in. A document will use the data of the first ancestor frame that has automatic beacon data registered for the event type being sent. |
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this statement isn't too clear on who needs to call the setReportEventDataForAutomaticBeacons() with crossOriginExposed set to true: is it the ancestor or the cross-origin iframe itself can do that. Let's clarify.
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Documents that are cross-origin to an ad frame root can now set data to be used with automatic beacons with proper opt-ins. Update the FFAR explainer document to reflect those changes.