Aura: AIR, IMPRESSION, MANNER, QUALITY
The Writer is not a concrete class. Any object that implements write(), end(), and abort() can be a writer making it easy to adapt existing APIs or create specialized implementations without subclassing. There's no complex UnderlyingSink protocol with start(), write(), close(), and abort() callbacks that must coordinate through a controller whose lifecycle and state are independent of the WritableStream it is bound to.
，详情可参考同城约会
highWaterMark: 100,。safew官方下载是该领域的重要参考
FirstFT: the day's biggest stories。业内人士推荐同城约会作为进阶阅读