디버깅용 같은데.. 사용법을 잘 모르겠네요..
2번째 링크가 데모라고 하니.. 테스트해보세요.
아래링크에 글씨 넣으면 예쁜 고양이가 나옵니다.
Test out new coding ideas
Develop tools and utilities for everyday work
Debug applications in the same environment they're running in
Practice with new libraries or APIs with your existing code
Give new hires a place to get up to speed with the codebase
Double check how that rarely-used function actually works
Give all that "secret" or commented-out code somewhere to live
Live-document existing features and tools
Generate and manage reports