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<!DOCTYPE html> <html> <body> <video id="myVideo" width="640" height="360" controls> <source src="/i/video/shanghai.mp4" type="video/mp4"> <source src="/i/video/shanghai.ogg" type="video/ogg"> 您的浏览器不支持 video 标签。 </video><br> <button onclick="enableAutoplay()" type="button">启用自动播放</button> <button onclick="disableAutoplay()" type="button">禁用自动播放</button> <button onclick="checkAutoplay()" type="button">检查自动播放状态</button> <script> var x = document.getElementById("myVideo"); function enableAutoplay() { x.autoplay = true; x.load(); } function disableAutoplay() { x.autoplay = false; x.load(); } function checkAutoplay() { alert(x.autoplay); } </script> </body> </html>