For implementers, BYOB adds significant complexity. The stream must track pending BYOB requests, handle partial fills, manage buffer detachment correctly, and coordinate between the BYOB reader and the underlying source. The Web Platform Tests for readable byte streams include dedicated test files just for BYOB edge cases: detached buffers, bad views, response-after-enqueue ordering, and more.
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。关于这个话题，WPS官方版本下载提供了深入分析
// not critical but safer when bytesToWrite != view.byteLength
For multiple readers