They're not JavaScript because the language used to write the source code isn't in JavaScript. Babel is used to bring modern JavaScript features into older brow

They're not JavaScript because the language used to write the source code isn't in JavaScript. Babel is used to bring modern JavaScript features into older browsers, but you're still writing JavaScript. If the language you are writing doesn't at least attempt to conform with some signficant portion of the ECMAScript specification, it's not JavaScript.