TaskAttributionTiming

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

See full compatibility

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The TaskAttributionTiming interface returns information about the work involved in a long task and its associate frame context. The frame context, also called the container, is the iframe, embed or object that is being implicated, on the whole, for a long task.

You usually work with TaskAttributionTiming objects when observing long tasks.

TaskAttributionTiming inherits from PerformanceEntry.

Instance properties

This interface extends the following PerformanceEntry properties for event timing performance entry types by qualifying them as follows:

PerformanceEntry.duration Read only: Always returns 0, as duration is not applicable for this interface.
PerformanceEntry.entryType Read only: Always returns taskattribution.
PerformanceEntry.name Read only: Always returns "unknown".
PerformanceEntry.startTime Read only: Always returns 0.

This interface also supports the following properties:

TaskAttributionTiming.containerType Read only: Returns the type of frame container, one of iframe, embed, or object.
TaskAttributionTiming.containerSrc Read only: Returns the container's src attribute.
TaskAttributionTiming.containerId Read only: Returns the container's id attribute.
TaskAttributionTiming.containerName Read only: Returns the container's name attribute.

Instance methods

TaskAttributionTiming.toJSON(): Returns a JSON representation of the TaskAttributionTiming object.

Specifications

Specification
Long Tasks API # sec-TaskAttributionTiming

Browser compatibility

	desktop					mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on iOS	Samsung Internet	WebView Android	WebView on iOS
`TaskAttributionTiming` Experimental	Chrome – Full support Chrome 58 (Release date: 2017-04-19) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – No support Firefox footnote footnote See bug 1348405	Opera – Full support Opera 45 (Release date: 2017-05-10) footnote Full support	Safari – No support Safari footnote No support	Chrome Android – Full support Chrome Android 58 (Release date: 2017-04-25) footnote Full support	Firefox for Android – No support Firefox for Android footnote footnote See bug 1348405	Opera Android – Full support Opera Android 43 (Release date: 2017-09-27) footnote Full support	Safari on iOS – No support Safari on iOS footnote No support	Samsung Internet – Full support Samsung Internet 7 (Release date: 2018-03-16) footnote Full support	WebView Android – Full support WebView Android 58 (Release date: 2017-04-25) footnote Full support	WebView on iOS – No support WebView on iOS footnote No support
`containerId` Experimental	Chrome – Full support Chrome 58 (Release date: 2017-04-19) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – No support Firefox footnote No support	Opera – Full support Opera 45 (Release date: 2017-05-10) footnote Full support	Safari – No support Safari footnote No support	Chrome Android – Full support Chrome Android 58 (Release date: 2017-04-25) footnote Full support	Firefox for Android – No support Firefox for Android footnote No support	Opera Android – Full support Opera Android 43 (Release date: 2017-09-27) footnote Full support	Safari on iOS – No support Safari on iOS footnote No support	Samsung Internet – Full support Samsung Internet 7 (Release date: 2018-03-16) footnote Full support	WebView Android – Full support WebView Android 58 (Release date: 2017-04-25) footnote Full support	WebView on iOS – No support WebView on iOS footnote No support
`containerName` Experimental	Chrome – Full support Chrome 58 (Release date: 2017-04-19) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – No support Firefox footnote No support	Opera – Full support Opera 45 (Release date: 2017-05-10) footnote Full support	Safari – No support Safari footnote No support	Chrome Android – Full support Chrome Android 58 (Release date: 2017-04-25) footnote Full support	Firefox for Android – No support Firefox for Android footnote No support	Opera Android – Full support Opera Android 43 (Release date: 2017-09-27) footnote Full support	Safari on iOS – No support Safari on iOS footnote No support	Samsung Internet – Full support Samsung Internet 7 (Release date: 2018-03-16) footnote Full support	WebView Android – Full support WebView Android 58 (Release date: 2017-04-25) footnote Full support	WebView on iOS – No support WebView on iOS footnote No support
`containerSrc` Experimental	Chrome – Full support Chrome 58 (Release date: 2017-04-19) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – No support Firefox footnote No support	Opera – Full support Opera 45 (Release date: 2017-05-10) footnote Full support	Safari – No support Safari footnote No support	Chrome Android – Full support Chrome Android 58 (Release date: 2017-04-25) footnote Full support	Firefox for Android – No support Firefox for Android footnote No support	Opera Android – Full support Opera Android 43 (Release date: 2017-09-27) footnote Full support	Safari on iOS – No support Safari on iOS footnote No support	Samsung Internet – Full support Samsung Internet 7 (Release date: 2018-03-16) footnote Full support	WebView Android – Full support WebView Android 58 (Release date: 2017-04-25) footnote Full support	WebView on iOS – No support WebView on iOS footnote No support
`containerType` Experimental	Chrome – Full support Chrome 58 (Release date: 2017-04-19) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – No support Firefox footnote No support	Opera – Full support Opera 45 (Release date: 2017-05-10) footnote Full support	Safari – No support Safari footnote No support	Chrome Android – Full support Chrome Android 58 (Release date: 2017-04-25) footnote Full support	Firefox for Android – No support Firefox for Android footnote No support	Opera Android – Full support Opera Android 43 (Release date: 2017-09-27) footnote Full support	Safari on iOS – No support Safari on iOS footnote No support	Samsung Internet – Full support Samsung Internet 7 (Release date: 2018-03-16) footnote Full support	WebView Android – Full support WebView Android 58 (Release date: 2017-04-25) footnote Full support	WebView on iOS – No support WebView on iOS footnote No support
`toJSON` Experimental	Chrome – Full support Chrome 58 (Release date: 2017-04-19) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – No support Firefox footnote No support	Opera – Full support Opera 45 (Release date: 2017-05-10) footnote Full support	Safari – No support Safari footnote No support	Chrome Android – Full support Chrome Android 58 (Release date: 2017-04-25) footnote Full support	Firefox for Android – No support Firefox for Android footnote No support	Opera Android – Full support Opera Android 43 (Release date: 2017-09-27) footnote Full support	Safari on iOS – No support Safari on iOS footnote No support	Samsung Internet – Full support Samsung Internet 7 (Release date: 2018-03-16) footnote Full support	WebView Android – Full support WebView Android 58 (Release date: 2017-04-25) footnote Full support	WebView on iOS – No support WebView on iOS footnote No support

Tip: you can click/tap on a cell for more information.

Full support: Full support
No support: No support
: Experimental. Expect behavior to change in the future.
: See implementation notes.

TaskAttributionTiming

Instance properties

Instance methods

Specifications

Browser compatibility

Legend

See also