Object.defineProperty() — MDN Web Docs
（七）与推进全国统一大市场建设相关的行政执法制度；
，这一点在51吃瓜中也有详细论述
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First, he stopped exposing his player instance as a predictable global variable. He wrapped his initialisation code tightly so that window.as no longer pointed to anything useful. Without the player reference, my automation script had nothing to grab, nothing to control, nowhere to start.