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.
無料でスマホから切り抜き・描画からフィルター・OCR・幅広い画像処理オプションまでありとあらゆる写真を加工する機能が山ほど使えるオープンソースAndroidアプリ「Image Toolbox」レビュー
。关于这个话题，体育直播提供了深入分析
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