I am getting
from UglifyJs SyntaxError: Unexpected token: punc (.)
error when running npm run build on angular2-webpack
This is coming from a spread operator.
Trying to demo a project in less than 1 hour.... FML
Changing the target from ES6 to ES5 can help. However, I was able to find a more reliable solution to use the advantages of ES6.
Simply specify UglifyJs in your package.json, and let npm handles the dependencies.
"uglify-js": "git://github.com/mishoo/UglifyJS2#harmony-v2.8.22",