【问题标题】:".playVideo is not a function" when trying to play youtube video javascript尝试播放 youtube 视频 javascript 时“.playVideo 不是函数”
【发布时间】:2020-03-16 20:45:54
【问题描述】:

我正在尝试使用 javascript 和 <iframe> 标签播放 youtube 视频。到目前为止,我收到此错误:“document.getElementById(...).playVideo 不是函数”。这是我的代码:

Javascript: document.getElementById("video").playVideo();

HTML: <iframe id="video" src="url"> </iframe>

【问题讨论】:

    标签: javascript html iframe youtube


    【解决方案1】:

    您是否尝试自动播放视频?在这种情况下,您需要在 youtube URL 的末尾添加 ?autoplay=1 并向您的 iframe 标记添加允许属性,如下所示

    <iframe src="https://www.youtube.com/embed/VIDEO_ID?autoplay=1" allow='autoplay'></iframe>
    

    如果你想使用 javascript 来控制视频播放器,我建议使用 Youtube Player API。示例代码如下(取自 youtube 的文档)-

    <!DOCTYPE html>
    <html>
      <body>
        <!-- 1. The <iframe> (and video player) will replace this <div> tag. -->
        <div id="player"></div>
    
        <script>
          // 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: '390',
              width: '640',
              videoId: 'M7lc1UVf-VE',
              events: {
                'onReady': onPlayerReady,
                'onStateChange': onPlayerStateChange
              }
            });
          }
    
          // 4. The API will call this function when the video player is ready.
          function onPlayerReady(event) {
            event.target.playVideo();
          }
    
          // 5. The API calls this function when the player's state changes.
          //    The function indicates that when playing a video (state=1),
          //    the player should play for six seconds and then stop.
          var done = false;
          function onPlayerStateChange(event) {
            if (event.data == YT.PlayerState.PLAYING && !done) {
              setTimeout(stopVideo, 6000);
              done = true;
            }
          }
          function stopVideo() {
            player.stopVideo();
          }
        </script>
      </body>
    </html>
    

    如果你想要更详细的例子,这里有很好的记录 -

    https://developers.google.com/youtube/iframe_api_reference

    【讨论】:

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