PerformanceScriptTiming: invoker property

Limited availability

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

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

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 PerformanceScriptTiming.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

Specification
Long Animation Frames API
# dom-performancescripttiming-invoker

Browser compatibility

See also