get desiredSize() { return closed ? null : 1; },
Introduction to events: event propagation — MDN Web Docs
，这一点在快连下载安装中也有详细论述
Version management: Each system state is versioned, making tracking easier
In a company-wide email, Spencer stated that he would stay on until the summer in an advisory role before, “starting the next chapter of my life”. For her part, Bond issued a statement on her LinkedIn account: “I’ve decided this is the right time for me to take my next step, both personally and professionally.” It was all extremely good natured, but its doubtful these airy missives tell the full tale.
the concept was well-known in the computer industry. As IBM designed the 2984,