选择数组的随机元素来设置 Youtube videoId API

Question

我正在尝试设置一个 videoId 数组，以便能够从中进行选择以随机加载。我尝试将视频数组添加为 videoId，但没有成功。我是一个 JS 新手，所以我不确定我应该为此传回什么。我做到了这一点：

<div id="player"></div>

<script>
function rotateYT() {
    var videos = [
        'ZMnjkcvjN-E',
        'RFQfSMbLCWw',
    ];

    var index=Math.floor(Math.random() * videos.length);
}
// 2. This code loads the IFrame Player API code asynchronously.
var tag = document.createElement('script');

tag.src = "https://www.youtube.com/iframe_api";
var firstScriptTag = document.getElementsByTagName('script')[0];
firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);

// 3. This function creates an <iframe> (and YouTube player)
//    after the API code downloads.
var player;
function onYouTubeIframeAPIReady() {
    player = new YT.Player('player', {
        height: '300',
        width: '300',
        videoId: videos[index], //where I'm trying to get the random videos
        events: {
            'onReady': onPlayerReady,
        }
    });
}

// 4. The API will call this function when the video player is ready.
function onPlayerReady(event) {
    event.target.playVideo();
    event.target.mute();
    event.target.setPlaybackQuality('small');
}
</script>

Answer 1

该函数需要返回选中的视频ID：

function rotateYT() {
    var videos = [
        'ZMnjkcvjN-E',
        'RFQfSMbLCWw',
    ];

    var index=Math.floor(Math.random() * videos.length);
    return videos[index];
}

那你需要在onYouTubeIframeAPIReady调用它：

function onYouTubeIframeAPIReady() {
    var videoID = rotateYT();
    player = new YT.Player('player', {
        height: '300',
        width: '300',
        videoId: videoID,
        events: {
            'onReady': onPlayerReady,
        }
    });
}