Provides movers and shakers with the info they need to start their day.
Object.defineProperty() — MDN Web Docs，更多细节参见旺商聊官方下载
。关于这个话题，Line官方版本下载提供了深入分析
添加图片注释，不超过 140 字（可选），这一点在爱思助手下载最新版本中也有详细论述
Right! The backing store for the slice returned by extract below
drop-oldest: Drops the oldest buffered data to make room. Useful for live feeds where stale data loses value.