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.
"Our family is devastated by the sudden passing of our beloved husband, father and grandfather," his family confirmed in a statement.，推荐阅读旺商聊官方下载获取更多信息
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References & Citations，推荐阅读搜狗输入法2026获取更多信息
Nature, Published online: 25 February 2026; doi:10.1038/d41586-026-00515-x