Class Fields not supported by babel in bookemarklet

[Ray Wadkins]

I wrote a bookmarklet using ES6 Classes and used class fields in my code. babylon is throwing an error, because, it seems that class fields aren't supported in babel preset env.
bablylonError.txt

[Peter Coles]

@rwadkins I removed Babel with v3.0.0. LMK if dropping it entirely and relying the browser’s native support works for you!