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HTML 参考手册
HTML 音频/视频 DOM buffered 属性
tryhtml5_av_prop_buffered
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<!DOCTYPE html> <html> <body> <button onclick="myFunction()" type="button">Get first buffered range</button><br> <video id="myVideo" width="320" height="176" controls> <source src="/demo/video/mov_bbb.mp4" type="video/mp4"> <source src="/demo/video/mov_bbb.ogg" type="video/ogg"> Your browser does not support HTML5 video. </video> <script> let vid = document.getElementById("myVideo"); function myFunction() { alert("Start: " + vid.buffered.start(0) + " End: " + vid.buffered.end(0)); } </script> </body> </html>