MDN does a pretty good job anyways. Perhaps I feel that it would be in keeping with that spirit to have this condition documented. This is partly because MDN is far easier to read for the purposes of _reference_ than the spec which is easier to read for the purposes of _implementing_. It's also easier to search and to share links to, as the link you presented earlier was both wrong and confusing, and there was no natural way to link to the part of the document you intended.
Perhaps the spec isn't the right tool for every job? That's why, for me, at least.
MDN does a pretty good job anyways. Perhaps I feel that it would be in keeping with that spirit to have this condition documented. This is partly because MDN is far easier to read for the purposes of _reference_ than the spec which is easier to read for the purposes of _implementing_. It's also easier to search and to share links to, as the link you presented earlier was both wrong and confusing, and there was no natural way to link to the part of the document you intended.
Perhaps the spec isn't the right tool for every job? That's why, for me, at least.
Submit a change, then. MDN isn't written by some secret cabal. It's written by all of us.