功能没有响应

Question

function onPlayerReady(event)
{
    event.target.cueVideoById({
        videoId: videos[index].vid,
        startSeconds: videos[index].startSeconds,
        endSeconds: videos[index].endSeconds,
        suggestedQuality: videos[index].suggestedQuality
    });

    event.target.playVideo();

    console.log('++++++++++++++++++++');
    console.log(player.getVolume());
    console.log(player.getDuration());
    console.log(player.getCurrentTime());
    console.log('++++++++++++++++++++');
}

这是输出

  

++++++++++++++++++++

     

未定义

     

未定义

     

未定义

     

++++++++++++++++++++

我做错了什么？

Answer 1

最后我得到了答案

这些功能在播放器处于播放状态时起作用，否则无法正常工作

if（event.data === YT.PlayerState.PLAYING）{

            console.log(player.getVolume());
            console.log(player.getDuration());
            console.log(player.getCurrentTime());

}