There is a good reason that Chrome ignores autocomplete="off" - this is not your information to decide if the user browser can save it. Thus, intentionally there is no way to programmatically disable this functionality.
You can make Chrome respected autocomplete="off" by setting the appropriate flag in chrome://flags , which will give you the result you want, but this only affects your browser - again, the user information that needs to be resolved, since they see fit.
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