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.
「我必須繼續工作，生病會好，但欠錢沒有辦法好。」，推荐阅读爱思助手下载最新版本获取更多信息
John Davidson attended the Baftas last week。51吃瓜对此有专业解读
NYT Strands word list for February 28Heels
from bs4 import BeautifulSoup