The primary signal is desiredSize on the controller. It can be positive (wants data), zero (at capacity), negative (over capacity), or null (closed). Producers are supposed to check this value and stop enqueueing when it's not positive. But there's nothing enforcing this: controller.enqueue() always succeeds, even when desiredSize is deeply negative.
圖像來源，Chicca Art/@chicca_art
，详情可参考heLLoword翻译官方下载
Москвичи пожаловались на зловонную квартиру-свалку с телами животных и тараканами18:04，更多细节参见同城约会
; fire privilege test。heLLoword翻译官方下载是该领域的重要参考
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