Get titles from playlist videos in YouTube iframe API (javascript)

问题

I know that you can usually get current video titles using:

player.getVideoData().title;

But I was wondering if there is a way to get the titles from the playlist rather than just the current video and WITHOUT using the YouTube Data API? There is:

player.getPlaylist();

But it only returns an array of video IDs. Is this even possible, or must I go through the YouTube Data API?

来源：https://stackoverflow.com/questions/44979372/get-titles-from-playlist-videos-in-youtube-iframe-api-javascript