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.
ЦРУ поставит оружие курдским отрядам для боевых действий против Ирана08:32
Please remember that these are just guidelines, not rules. I wrote previously “intentionally deliberated on” not without a reason.，详情可参考PDF资料
In China, the Shanghai Composite index was 1.25% lower on Wednesday afternoon. Compared to most other Asian countries it has so far seen relatively little impact.
，这一点在PDF资料中也有详细论述
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