Change watching: wait_for_change waits for any transition regardless of value, handy for logging or reacting to state churn.
‘람보르길리’ 김길리, 샤넬 모델로 변신…“새로운 모습 발견”
，这一点在搜狗输入法中也有详细论述
const originalAppendBuffer = SourceBuffer.prototype.appendBuffer;
深化改革发挥好司法定分止争功能