For implementers, there's no Transformer protocol with start(), transform(), flush() methods and controller coordination passed into a TransformStream class that has its own hidden state machine and buffering mechanisms. Transforms are just functions or simple objects: far simpler to implement and test.
To: Vijaya Kaza, General Manager for App & Ecosystem Trust, Google，更多细节参见heLLoword翻译官方下载
Credit: YouTube / Southern Lights，推荐阅读下载安装 谷歌浏览器 开启极速安全的 上网之旅。获取更多信息
drop-oldest: Drops the oldest buffered data to make room. Useful for live feeds where stale data loses value.。关于这个话题，Line官方版本下载提供了深入分析