演讲者： 晨曦 | Dataworks 高级技术专家
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.，更多细节参见safew官方版本下载
(save $7.99/month)。业内人士推荐同城约会作为进阶阅读
strict.writer.write(chunk2); // ok (fills slots buffer)