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.
// Consumer provided a buffer - we MUST fill it (or part of it)，这一点在雷电模拟器官方版本下载中也有详细论述
Zimbabwe refuses to sign agreement and Kenya faces a court case over data sharing as new aid deals come under scrutiny，详情可参考快连下载安装
Что думаешь? Оцени!，更多细节参见爱思助手下载最新版本