> One example is how almost every password manager including the built-in one in most browsers will assume that if there's a type="password" field, then the previous sibling field must be the username. Sometimes they'll even pick a field far away in the DOM like your chatbox input to autofill with the username.
Note that this behavior is defined as part of the `autocomplete` standard. https://html.spec.whatwg.org/multipage/form-control-infrastr...
> an input element whose type attribute is in the Text state that is followed by an input element whose type attribute is in the Password state
> New autofill field name: "username"
The intent isn't to pick a field far away in the DOM, though, so any autofill implementation doing that isn't being restrictive enough.