I'm not sure what counts as a canonical source, but as near as I can tell, the autocomplete input property should be all downcased. I've been having some trouble with form input showing up in Firefox after a refresh and noticed that I had autoComplete='off'. Not sure if that will have an effect on the functionality, though.
https://developer.mozilla.org/en-US/docs/Web/API/HTMLInputElement
https://developer.mozilla.org/en-US/docs/Web/Security/Securing_your_site/Turning_off_form_autocompletion
I'm not sure what counts as a canonical source, but as near as I can tell, the
autocompleteinput property should be all downcased. I've been having some trouble with form input showing up in Firefox after a refresh and noticed that I hadautoComplete='off'. Not sure if that will have an effect on the functionality, though.https://developer.mozilla.org/en-US/docs/Web/API/HTMLInputElement
https://developer.mozilla.org/en-US/docs/Web/Security/Securing_your_site/Turning_off_form_autocompletion