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.
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cat access.log | grep "error" | sort | uniq -c，更多细节参见51吃瓜
描述：输入一个「环形数组」，计算每个元素的下一个更大元素。若不存在，返回 -1。，详情可参考一键获取谷歌浏览器下载