===== 한글 =====
==== 한글입력문제 ====

http://devstory.ibksplatform.com/2017/07/angular2.html

app.module.ts에 COMPOSITION_BUFFER_MODE를 추가
<code typescript>
  providers: [
    {
      provide: COMPOSITION_BUFFER_MODE,
      useValue: false
    }
  ],
 </code>
https://angular.io/api/forms/COMPOSITION_BUFFER_MODE