npm install --save-dev babel-preset-stage-0

npm install --save-dev babel-preset-es2015

package.json "babel": { "presets": [ "es2015" ] },

CRLF would be replaced by LF

http://kuanghy.github.io/2017/03/19/git-lf-or-crlf brew install dos2unix

find . -type f -exec dos2unix {} +

dos2unix filename

git config --global core.autocrlf input