Results 41 - 60 of 77

PerformanceNavigationTiming.loadEventStart

The loadEventStart property returns a timestamp representing the time value equal to the time immediately before the load event of the current document is fired.
API Property Reference Web Performance

PerformanceNavigationTiming.redirectCount

The redirectCount property returns a timestamp representing the number of redirects since the last non-redirect navigation under the current browsing context.
API Property Reference Web Performance

PerformanceNavigationTiming.toJSON()

The toJSON() method is a serializer - it returns a JSON representation of the PerformanceNavigationTiming object.
API Method Reference Web Performance

PerformanceNavigationTiming.type

The type property returns a string representing the type of navigation. The value must be one of the following:
API Property Reference Web Performance

PerformanceNavigationTiming.unloadEventEnd

The unloadEventEnd property returns a timestamp representing the time value equal to the time immediately after the user agent finishes the unload event of the previous document. If there is no previous document, this property value is 0.
API Property Reference Web Performance

PerformanceNavigationTiming.unloadEventStart

The unloadEventStart property returns a timestamp representing the time value equal to the time immediately before the user agent starts the unload event of the previous document. If there is no previous document, this property returns 0.
API Property Reference Web Performance

PerformanceObserver

The PerformanceObserver interface is used to observe performance measurement events and be notified of new performance entries as they are recorded in the browser's performance timeline.
API Interface Reference Web Performance

PerformanceObserverEntryList

The PerformanceObserverEntryList interface is a list of peformance events that were explicitly observed via the observe() method.
API Interface Reference Web Performance

PerformanceResourceTiming

The PerformanceResourceTiming interface enables retrieving and analyzing detailed network timing data regarding the loading of an application's resources. An application can use the timing metrics to determine, for example, the length of time it takes to fetch a specific resource, such as an XMLHttpRequest, <SVG>, image, or script.
DOM Interface Reference Web Performance

PerformanceResourceTiming.connectEnd

The connectEnd property returns the timestamp immediately after the browser finishes establishing the connection to the server to retrieve the resource. The timestamp value includes the time interval to establish the transport connection, as well as other time intervals such as SSL handshake and SOCKS authentication.
API Property Reference Web Performance

PerformanceResourceTiming.decodedBodySize

The decodedBodySize property returns the size (in octets) received from the fetch (HTTP or cache) of the message body, after removing any applied content-codings. If the resource is retrieved from an application cache or local resources, it returns the size of the payload after removing any applied content-codings.
API Property Reference Web Performance

PerformanceResourceTiming.domainLookupEnd

The domainLookupEnd property returns the timestamp immediately after the browser finishes the domain name lookup for the resource.
API Property Reference Web Performance

PerformanceResourceTiming.domainLookupStart

The domainLookupStart property returns the timestamp immediately before the browser starts the domain name lookup for the resource.
API Property Reference Web Performance

PerformanceResourceTiming.encodedBodySize

The encodedBodySize property represents the size (in octets) received from the fetch (HTTP or cache), of the payload body, before removing any applied content-codings.
API Property Reference Web Performance

PerformanceResourceTiming.fetchStart

The fetchStart property represents a timestamp immediately before the browser starts to fetch the resource.
API Property Reference Web Performance

PerformanceResourceTiming.initiatorType

The initiatorType property is a string that represents the type of resource that initiated the performance event. The value of this string is as follows:
API Property Reference Web Performance

PerformanceResourceTiming.nextHopProtocol

The nextHopProtocol property is a string representing the network protocol used to fetch the resource, as identified by the ALPN Protocol ID (RFC7301).
API Property Reference Web Performance

PerformanceResourceTiming.redirectEnd

The redirectEnd property returns a timestamp immediately after receiving the last byte of the response of the last redirect.
API Property Reference Web Performance

PerformanceResourceTiming.redirectStart

The redirectStart property returns a timestamp representing the start time of the fetch which that initiates the redirect.
API Property Reference Web Performance

PerformanceResourceTiming.requestStart

The requestStart property returns a timestamp of the time immediately before the browser starts requesting the resource from the server, cache, or local resource. If the transport connection fails and the browser retires the request, the value returned will be the start of the retry request.
API Property Reference Web Performance