This property getter must be called with the PerformanceResourceTiming object as the receiver.
PerformanceResourceTiming
新增于: v18.2.0, v16.17.0
在接收到最后一次重定向的响应的最后一个字节后立即创建的高分辨率毫秒时间戳。
【The high resolution millisecond timestamp that will be created immediately after receiving the last byte of the response of the last redirect.】