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HTML 音频/视频 DOM preload 属性
tryhtml5_av_prop_preload
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<!DOCTYPE html> <html> <body> <button onclick="enablePreload()" type="button">Enable preload</button> <button onclick="disablePreload()" type="button">Disable preload</button> <button onclick="checkPreload()" type="button">Check preload status</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 enablePreload() { vid.preload = "auto"; } function disablePreload() { vid.preload = "none"; } function checkPreload() { alert(vid.preload); } </script> </body> </html>