如何使用javascript在for循环中解析这个简单的json对象？

Question

var playlist = JSON.parse('{"VideoID" : {"VideoTitle" : "the title of the video"} }');

for(var video in playlist){
document.write(video + " "+ video.title +"<br>");
}

输出为：VideoID undefined

我希望将其视为：VideoID视频标题

Answer 1

正确用法是：

 for(var video in playlist){
    document.write(video + " "+ playlist[video].VideoTitle +"<br>");
 }

Answer 2

这应该有效，

var playlist = JSON.parse('{"VideoID" : {"VideoTitle" : "the title of the video"} }');

document.write(playlist.VideoID.VideoTitle);