list of possible initiator types from the resource timing API?

[ThierryMajutec]

Is there any available list of initiator types supported by the resource timing API ?
For example, I see things like "internal" as initiator type from this API in measures I perform, but do not find any available literature.

[npm1]

I think there was one before... @noamr could we add a note explaining this a bit? It seems to come from mark resource timing but someone reading the spec cannot know where that is being invoked.

[noamr]

This is a big TODO item here: whatwg/html#6542
The different resource-timing reporters need to send their initiator type when they're ready to report.
It's a pretty big list, as an initiator type can be an element's tag name.

[noamr]

Marking as duplicate of w3c/resource-timing#276. Please also follow whatwg/html#6542 if interested in the specifics.