函数没有响应

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

---

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

undefined

undefined

undefined

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

---

我做错了什么？

Answer 1

终于找到答案了

该功能在播放器处于播放状态时有效，否则无效

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

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

}