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.
Danny Chambers, who represents Winchester, said sewage had been "pouring" into the River Itchen, potentially affecting the endangered fish currently laying eggs in the chalk stream.
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康佳，曾经的彩电大王，如今已“踏进ICU”，2025年预计亏损高达100亿以上，净资产或为负，退市风险逼近。
backpressure: 'strict' // or 'block', 'drop-oldest', 'drop-newest'
英國超市將巧克力鎖進防盜盒阻止「訂單式」偷竊