类:PerformanceObserver
\Class: PerformanceObserver
新增于: v19.0.0
PerformanceObserver 类。有关详细信息,请参阅 PerformanceObserver。
\The PerformanceObserver class. See PerformanceObserver for more details.
\Class: PerformanceObserver
PerformanceObserver 类。有关详细信息,请参阅 PerformanceObserver。
\The PerformanceObserver class. See PerformanceObserver for more details.