W3School TIY Editor
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<!DOCTYPE html> <html> <body> <p>单击按钮可创建一个带有控件的 VIDEO 元素。</p> <button onclick="myFunction()">试一试</button> <br><br> <script> function myFunction() { var x = document.createElement("VIDEO"); x.setAttribute("src","/i/video/shanghai.mp4"); x.setAttribute("width", "640"); x.setAttribute("height", "360"); x.setAttribute("controls", "controls"); document.body.appendChild(x); } </script> </body> </html>