anchor.diff:    with excellent support for Angular apps that use routing.
   
     ***[typescript](https://www.npmjs.com/package/typescript)*** - 
  -  *tsc* 컴파일러를 포함한 TypeScript 언어 서버
  +  *tsc* 컴파일러를 포함한 TypeScript 언어 서버.
   
     the TypeScript language server, including the *tsc* TypeScript compiler.
     
  
positive.code:   It explains why you load the [polyfill](#polyfills) *dependency* packages in the QuickStart `package.json`,
    and why you'll need those packages in your own applications.
    
    이에대한 설명은 [peer dependencies](https://nodejs.org/en/blog/npm/peer-dependencies/)을 참고하세요.
  
    An explanation of [peer dependencies](https://nodejs.org/en/blog/npm/peer-dependencies/) follows.
    
  
negative.code:   ### Polyfill packages
    
    Angular는 어플리케이션 환경에 특정한 [폴리필](https://en.wikipedia.org/wiki/Polyfill)이 필요합니다.
    npm 패키지를 이용해 이 폴리필들을 설치하면 Angular는 `package.json`의 *peerDependencies* 목록에 작성합니다.
  
    Angular requires certain [polyfills](https://en.wikipedia.org/wiki/Polyfill) in the application environment.
    Install these polyfills using the npm packages that Angular lists in the *peerDependencies* section of its `package.json`.
    
    반드시 여러분의 `package.json`에 있는 `dependencies` 목록에 이 패키지들을 작성하세요.
  
    You must list these packages in the `dependencies` section of your own `package.json`.
    
  .l-sub-section
    :marked
      본 요구사항에 대한 배경지식은 아래의 [왜 peerDependencies인가?](#why-peer-dependencies)를 참고하세요.
  
      For background on this requirement, see [Why peerDependencies?](#why-peer-dependencies).
  :marked
  