Clarify `detail` value of synthetic click event about html HOT 4 OPEN

@domenic Thank you for quick reply!

I think the sentence in HTMLLabelElement definition made me misled at least. And Chrome uses non-default value for pointerId. They set -1 but its default is 0.

from html.

And also this explanation must web developers to understand the detail value etc is copied from the original event.
https://html.spec.whatwg.org/multipage/forms.html#the-label-element:the-input-element

as if the element itself had been triggered by the user

So, this should be corrected too.

from html.

I think the spec is pretty clear on this already? It says to leave them at their default values, which is what other browsers are doing.

from html.

Oh, about the pointerId, it's defined by the Pointer Events. However, it's hard to realize that from the HTML spec's definition.

from html.