Interface Performance

Provides access to performance-related information for the current page. It's part of the High Resolution Time API, but is enhanced by the Performance Timeline API, the Navigation Timing API, the User Timing API, and the Resource Timing API.

Hierarchy

EventTarget
- Performance

Index

Properties

eventCounts navigation onresourcetimingbufferfull timeOrigin timing

Methods

addEventListener clearMarks clearMeasures clearResourceTimings dispatchEvent getEntries getEntriesByName getEntriesByType mark measure now removeEventListener setResourceTimingBufferSize toJSON

Properties

`Readonly` eventCounts

eventCounts: EventCounts

`Readonly` navigation

navigation: PerformanceNavigation

Deprecated

onresourcetimingbufferfull

onresourcetimingbufferfull: ((this: Performance, ev: Event) => any)

Type declaration

- (this: Performance, ev: Event): any
- Parameters
  - this: Performance
  - ev: Event
  Returns any

`Readonly` timeOrigin

timeOrigin: number

`Readonly` timing

timing: PerformanceTiming

Deprecated

Methods

addEventListener

addEventListener<K>(type: K, listener: ((this: Performance, ev: PerformanceEventMap[K]) => any), options?: boolean | AddEventListenerOptions): void
Type Parameters
- K extends "resourcetimingbufferfull"
Parameters
- type: K
- listener: ((this: Performance, ev: PerformanceEventMap[K]) => any)
  - - (this: Performance, ev: PerformanceEventMap[K]): any
    - Parameters
      
      this: Performance
      
      ev: PerformanceEventMap[K]
      
      Returns any
- Optional options: boolean | AddEventListenerOptions
Returns void
Overrides EventTarget.addEventListener
- Defined in node_modules/typescript/lib/lib.dom.d.ts:10648
addEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void
Parameters
- type: string
- listener: EventListenerOrEventListenerObject
- Optional options: boolean | AddEventListenerOptions
Returns void
Overrides EventTarget.addEventListener
- Defined in node_modules/typescript/lib/lib.dom.d.ts:10649

clearMarks

clearMarks(markName?: string): void
Parameters
- Optional markName: string
Returns void
- Defined in node_modules/typescript/lib/lib.dom.d.ts:10637

clearMeasures

clearMeasures(measureName?: string): void
Parameters
- Optional measureName: string
Returns void
- Defined in node_modules/typescript/lib/lib.dom.d.ts:10638

clearResourceTimings

clearResourceTimings(): void
Returns void
- Defined in node_modules/typescript/lib/lib.dom.d.ts:10639

dispatchEvent

dispatchEvent(event: Event): boolean
Dispatches a synthetic event event to target and returns true if either event's cancelable attribute value is false or its preventDefault() method was not invoked, and false otherwise.
Parameters
- event: Event
Returns boolean
Inherited from EventTarget.dispatchEvent
- Defined in node_modules/typescript/lib/lib.dom.d.ts:5309

getEntries

getEntries(): PerformanceEntryList
Returns PerformanceEntryList
- Defined in node_modules/typescript/lib/lib.dom.d.ts:10640

getEntriesByName

getEntriesByName(name: string, type?: string): PerformanceEntryList
Parameters
- name: string
- Optional type: string
Returns PerformanceEntryList
- Defined in node_modules/typescript/lib/lib.dom.d.ts:10641

getEntriesByType

getEntriesByType(type: string): PerformanceEntryList
Parameters
- type: string
Returns PerformanceEntryList
- Defined in node_modules/typescript/lib/lib.dom.d.ts:10642

mark

mark(markName: string, markOptions?: PerformanceMarkOptions): PerformanceMark
Parameters
- markName: string
- Optional markOptions: PerformanceMarkOptions
Returns PerformanceMark
- Defined in node_modules/typescript/lib/lib.dom.d.ts:10643

measure

measure(measureName: string, startOrMeasureOptions?: string | PerformanceMeasureOptions, endMark?: string): PerformanceMeasure
Parameters
- measureName: string
- Optional startOrMeasureOptions: string | PerformanceMeasureOptions
- Optional endMark: string
Returns PerformanceMeasure
- Defined in node_modules/typescript/lib/lib.dom.d.ts:10644

now

now(): number
Returns number
- Defined in node_modules/typescript/lib/lib.dom.d.ts:10645

removeEventListener

removeEventListener<K>(type: K, listener: ((this: Performance, ev: PerformanceEventMap[K]) => any), options?: boolean | EventListenerOptions): void
Type Parameters
- K extends "resourcetimingbufferfull"
Parameters
- type: K
- listener: ((this: Performance, ev: PerformanceEventMap[K]) => any)
  - - (this: Performance, ev: PerformanceEventMap[K]): any
    - Parameters
      
      this: Performance
      
      ev: PerformanceEventMap[K]
      
      Returns any
- Optional options: boolean | EventListenerOptions
Returns void
Overrides EventTarget.removeEventListener
- Defined in node_modules/typescript/lib/lib.dom.d.ts:10650
removeEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | EventListenerOptions): void
Parameters
- type: string
- listener: EventListenerOrEventListenerObject
- Optional options: boolean | EventListenerOptions
Returns void
Overrides EventTarget.removeEventListener
- Defined in node_modules/typescript/lib/lib.dom.d.ts:10651

setResourceTimingBufferSize

setResourceTimingBufferSize(maxSize: number): void
Parameters
- maxSize: number
Returns void
- Defined in node_modules/typescript/lib/lib.dom.d.ts:10646

toJSON

toJSON(): any
Returns any
- Defined in node_modules/typescript/lib/lib.dom.d.ts:10647

Interface Performance

Hierarchy

Index

Properties

Methods

Properties

Readonly eventCounts

Readonly navigation

Deprecated

onresourcetimingbufferfull

Type declaration

Parameters

this: Performance

ev: Event

Returns any

Readonly timeOrigin

Readonly timing

Deprecated

Methods

addEventListener

Type Parameters

K extends "resourcetimingbufferfull"

Parameters

type: K

listener: ((this: Performance, ev: PerformanceEventMap[K]) => any)

Parameters

this: Performance

ev: PerformanceEventMap[K]

Returns any

Optional options: boolean | AddEventListenerOptions

Returns void

Parameters

type: string

listener: EventListenerOrEventListenerObject

Optional options: boolean | AddEventListenerOptions

Returns void

clearMarks

Parameters

Optional markName: string

Returns void

clearMeasures

Parameters

Optional measureName: string

Returns void

clearResourceTimings

Returns void

dispatchEvent

Parameters

event: Event

Returns boolean

getEntries

Returns PerformanceEntryList

getEntriesByName

Parameters

name: string

Optional type: string

Returns PerformanceEntryList

getEntriesByType

Parameters

type: string

Returns PerformanceEntryList

mark

Parameters

markName: string

Optional markOptions: PerformanceMarkOptions

Returns PerformanceMark

measure

Parameters

measureName: string

Optional startOrMeasureOptions: string | PerformanceMeasureOptions

Optional endMark: string

Returns PerformanceMeasure

now

Returns number

removeEventListener

Type Parameters

K extends "resourcetimingbufferfull"

Parameters

type: K

listener: ((this: Performance, ev: PerformanceEventMap[K]) => any)

`Readonly` eventCounts

`Readonly` navigation

`Readonly` timeOrigin

`Readonly` timing

`Optional` options: boolean | AddEventListenerOptions

`Optional` options: boolean | AddEventListenerOptions

`Optional` markName: string

`Optional` measureName: string

`Optional` type: string

`Optional` markOptions: PerformanceMarkOptions

`Optional` startOrMeasureOptions: string | PerformanceMeasureOptions

`Optional` endMark: string

`Optional` options: boolean | EventListenerOptions

`Optional` options: boolean | EventListenerOptions