https://tony40508.github.io/rxjs-practice/rxjs-video-drag-practice/ || https://tony40508.github.io/rxjs-practice/rxjs-auto-complete-practice/
https://tony40508.github.io/rxjs-practice/rxjs-video-drag-practice/ || https://tony40508.github.io/rxjs-practice/rxjs-auto-complete-practice/