WARNING in./~/rxjs/Observable/IntervalObservable.js

WARNING in ./~/rxjs/Observable/IntervalObservable.js

There is another module with an equal name when case is ignored.

This can lead to unexpected behavior when compiling on a filesystem with other case-semantic.

Rename module if multiple modules are expected or use equal casing if one module is expected.

import { IntervalObservable } from "rxjs/observable/IntervalObservable";

import 'rxjs/add/observable/interval';

이거 2개를 import 했다. 하나만 하자.

?? require 할때 대소문자 문제

http://purpleops.com/articles/webpack-filename-case-warnings/