If we drag file promises onto an editable area, then attachments should not be inserted into the editable area since attachment elements are disabled.

On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".


PASS window.HTMLAttachmentElement is undefined.
PASS document.createElement("attachment") instanceof HTMLUnknownElement is true
PASS editable.querySelector("attachment") is null
PASS editable.textContent is ""
PASS successfullyParsed is true

TEST COMPLETE