The duration of the performance entry.
The duration of the performance entry. The meaning of this property depends on the value of this entry's entryType.
The type of performance metric that this entry represents.
The name for a performance entry.
The name for a performance entry. It acts as an identifier, but it does not have to be unique. The value depends on the subclass.
The first timestamp recorded for this performance entry.
The first timestamp recorded for this performance entry. The meaning of this property depends on the value of this entry's entryType.
Returns a JSON representation of the PerformanceEntry object.
Encapsulates a single performance metric that is part of the browser's performance timeline.