Error building project from vue-cli webpack about vue-socket.io

[tomvdv]

Update your UglifyJsPlugin configuration in /build/webpack.prod.conf.js to avoid mangling names, like so:

 new webpack.optimize.UglifyJsPlugin({
   compress: {
     warnings: false
   },
   mangle: false
 }),

[drozdzynski]

Hello,

I have the same problem, on dev build works, but on production build not work.
Laravel elixir + webpack + vuejs2

My console log: app.js:54 Uncaught ReferenceError: c is not define

[Neewd]

Don't work for me :(
Even in dev or prod.