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.
В Финляндии предупредили об опасном шаге ЕС против России09:28，推荐阅读搜狗输入法2026获取更多信息
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"However, the energy market does continue to remain volatile due to ongoing global geopolitical concerns."
And for Alastair and other streamers keen to protect themselves and their followers online, the damage is already done.