PerformanceMark - Web APIs 编辑

PerformanceMark is an abstract interface for PerformanceEntry objects with an entryType of "mark". Entries of this type are created by calling performance.mark() to add a named DOMHighResTimeStamp (the mark) to the browser's performance timeline.

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Note:

Properties

This interface has no properties but it extends the following PerformanceEntry properties by qualifying/constraining the properties as follows:

PerformanceEntry.entryType

Returns "mark".

PerformanceEntry.name

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

PerformanceEntry.startTime

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

PerformanceEntry.duration

Returns "0". (A mark has no duration.)

Methods

This interface has no methods.

Example

See the example in Using the User Timing API.

Specifications

Browser compatibility

BCD tables only load in the browser

See also

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