[Vuejs]-Webpack resolve.alias OS-specific error

Solved it for myself.

For anyone who eventually runs into the same path, it does nothing to do with webpack or any other libraries.

My Defines module’s filename is src/js/defines.js, starting lowercased d, whereas it is imported as 'src/js/Defines.js with uppercase D. Maybe I changed the filename by mistake. Works fine in OS X, but error in CentOS 7.