Is there a W3C valid way to disable autocomplete in a HTML form?

Question

When using the xhtml1-transitional.dtd doctype, collecting a credit card number with the following HTML

Answer 1

I MADE THIS WORK IN 2020!

I basically create a css class that applies -webkit-text-security to my inputs.

Here's the link to a more recent discussion: https://stackoverflow.com/a/64471795/8754782