Meus programas estão funcionando mas aparece essa mensagens de modo Quirks, como posso resolver esse problema?
One or more documents in this page is in Quirks Mode, which will render the affected document(s) with quirks incompatible with the current HTML and CSS specifications.
Quirks Mode exists mostly due to historical reasons. If this is not intentional, you can add or modify the DOCTYPE to be <!DOCTYPE html>
to render the page in No Quirks Mode.