PerformanceMark is an interface for
objects with an
Entries of this type are typically created by calling
to add a
mark) to the browser's performance timeline. To create a performance mark that isn't added to the browser's performance timeline, use the constructor.
This interface extends the following
properties by qualifying/constraining the properties as follows:
Returns the name given to the mark when it was created via a call to
0". (A mark has no
This interface also supports the following properties:
Returns arbitrary metadata that has been included in the mark upon construction.
This interface has no methods.