One of the unexpected use of shadow DOMs for me was a document generated for image resource URLs [1], because the HTML standard apparently specifies the exact D

One of the unexpected use of shadow DOMs for me was a document generated for image resource URLs [1], because the HTML standard apparently specifies the exact DOM structure of the generated document except for the `<head>` element [2]. [1] https://github.com/chromium/chromium/blob/f02ca734bf0/third_party/blink/renderer/core/html/image_document.cc#L279-L284 https://github.com/chromium/chromium/blob/f02ca734bf0/third_... [2] https://html.spec.whatwg.org/multipage/document-lifecycle.html#read-media https://html.spec.whatwg.org/multipage/document-lifecycle.ht...