Am I a Designer or Developer?

If you’re a front-end engineer, are you a designer or developer?

Some designers produce really good front-end code. (Html/Css)

Some developers product really good front-end code. (Html/Css/JavaScript)

Only the designers can design… The developers cannot design… (Visual Stunning Work)

Is this true?

So the question becomes, if you want to become a professional, what do you focus on?