<html > <meta charset="UTF-8"> <body> <button onclick="launchFullscreen(document.documentElement);">启动全屏</button> <script> function launchFullscreen(element) { if(element.requestFullscreen) { element.requestFullscreen(); } else if(element.mozRequestFullScreen) { element.mozRequestFullScreen(); } else if(element.webkitRequestFullscreen) { element.webkitRequestFullscreen(); } else if(element.msRequestFullscreen) { element.msRequestFullscreen(); } } </script> </body> </html>