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"`