PerformanceScriptTiming: invoker property

Limited availability

The invoker read-only property of the PerformanceScriptTiming interface returns a string value indicating the identity of the feature that, when invoked, ran the script.

Value

A string, the structure of which depends on the script’s invokerType value:

invokerType	invoker string structure	Example(s)
"user-callback"	The object class the containing function is defined on, followed by a dot, followed by the function name.	"Window.requestAnimationFrame", "Window.setTimeout"
"event-listener"	The tagName of the element, followed by a hash and its id (#id) or by src= and its src value in square brackets ([src=url]) if an id is not present, followed by a dot, followed by the event handler property.	"IMG#hero.onload", "IMG[src=https://example.com/img.jpg].onload", "BUTTON#updateCart.onclick"
"resolve-promise" or "reject-promise"	The object and method that invoked the promise, followed by a dot, followed by "then" for "resolve-promise" and "catch" for "reject-promise".	"Response.json.then", "Response.json.catch"
"classic-script" or "module-script"	The source URL of the invoking script.	"https://example.com/scripts/myscript.js"

Examples

See Long animation frame timing for examples related to the Long Animation Frames API.

Specifications

Browser compatibility

See also

• Long animation frame timing
• PerformanceLongAnimationFrameTiming