ES6 Module Compilation * * * is not function

Today, learning Vuejs, which used the es6 of the writing, met a very strange problem, do not know if anyone met.

Installed module reference: Import vue from ' Vue '; (note that the Vue does not have {}, if you add this error uncaught TypeError: _vue. Vue is not a function)

Self-written module, Route-config.js:

Export function Routeconfig () {
Console.log (3);
}

Refer to the module you wrote: Import {routeconfig} from './lib/route-config '; (Note that there is {} at Routeconfig, if not, the error uncaught TypeError: (0, _ Routeconfig2.default) is not a function)

Do not know how to explain this phenomenon, now take notes to record.

ES6 Module Compilation * * * is not function