Definition
Fenced Frame defines FenceEvent
dictionary FenceEvent {
// This dictionary has two mutually exclusive modes that aren’t represented as
// distinct IDL types due to distinguishability issues:
//
// When reporting to a preregistered destination (specified by enum), the following
// properties are used:
DOMString eventType;
DOMString eventData;
sequence<FenceReportingDestination> destination;
// When setting event data to be used later in an automatic beacon, the
// following properties are used:
boolean once = false;
boolean crossOriginExposed = false;
// When reporting to a custom destination URL (with substitution of macros defined by
// the Protected Audience buyer), the following property is used:
USVString destinationURL;
};