PerformanceMark

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since ⁨September 2017⁩.

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PerformanceMark is an interface for PerformanceEntry objects with an entryType of "mark".

Entries of this type are typically created by calling performance.mark() to add a named DOMHighResTimeStamp (the 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.

Constructor

PerformanceMark()

Creates a new PerformanceMark object that isn't added to the browser's performance timeline.

Instance properties

This interface extends the following PerformanceEntry properties by qualifying/constraining the properties as follows:

PerformanceEntry.entryType Read only

Returns "mark".

PerformanceEntry.name Read only

Returns the name given to the mark when it was created via a call to performance.mark().

PerformanceEntry.startTime Read only

Returns the DOMHighResTimeStamp when performance.mark() was called.

PerformanceEntry.duration Read only

Returns 0. (A mark has no duration.)

This interface also supports the following properties:

PerformanceMark.detail Read only

Returns arbitrary metadata that has been included in the mark upon construction.

Instance methods

This interface has no methods.

Example

See the example in Using the User Timing API.

Specifications

Browser compatibility

See also

• User Timing (Overview)
• Using the User Timing API