Object.prototype.duration(): Temporal.Duration | null
When the object describes a time-bound resource, such as an audio or video,
a meeting, etc, the duration
property indicates the object's approximate
duration. The value MUST be expressed as an xsd:duration
as defined by
W3C XML Schema Definition Language (XSD) 1.1 Part 2: DataTypes, section
3.3.6 (e.g. a period of 5 seconds is represented as PT5S
).
Temporal.Duration | null