standard

https://html.spec.whatwg.org/multipage/images.html#updating-the-image-data

step 13:

If urlString is the same as the current request's current URL and current request's state is partially available, then abort the image request for the pending request, queue an element task on the DOM manipulation task source given the img element to restart the animation if restart animation is set, and re

The current fetch spec says that all blob: URL requests should result in a 200/OK response (a separate issue, it should probably also mention how to reply if the URL's blob url entry is null). That doesn't entirely match at least chrome's implementation though. In chrome we also support range requests on blob URLs, as long as the range consists of a single range. In that case we reply with a 206 a

Under point 6 of the list of steps to take to "ensure pre-insertion validity", as part of an attempt to implement a procedure involving the particular list of steps, I am having trouble unambiguously interpreting the following statement:

parent has an element child, child is a doctype, or child is non-null and a do