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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="getMuted()" type="button">视频默认静音了吗？</button> <button onclick="setToMuted()" type="button">设置视频默认静音，并重新加载视频</button> <script> var x = document.getElementById("myVideo"); function getMuted() { alert(x.defaultMuted); } function setToMuted() { x.defaultMuted = true; x.load() } </script> </body> </html>