由于函数是对象，因此它们可以存储属性。你可以让函数在每次调用（按下按钮）时自动增加一个'queue'属性，然后在函数执行结束时，检查它自己的队列属性是否> 0，如果是，则减少队列属性一个并使用 setTimeout 再次调用自己。

Since Functions are objects they can store properties. You can have your function increment a 'queue' property on itself every time its called (button pressed) and then at the end of the function execution, check if the queue property of itself is > 0, and if so, decrement the queue property by one and call itself again using setTimeout.