Unfortunately, it just adds `=""`. You can't see it in the dev tools because the browser strips it away.
Now, while the validation passes with empty string as a value, what frightens me, is that the AMP docs state that the online validator is not a complete validation and some errors would surface only after google crawls the content. I swear I read it somewhere in the official docs, I'll update when I find it :} -- You received this message because you are subscribed to the Google Groups "Elm Discuss" group. To unsubscribe from this group and stop receiving emails from it, send an email to elm-discuss+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.