video全屏参考：https://www.thecssninja.com/javascript/fullscreen
<!doctype html> <html> <head> <meta charset="utf-8"> <title>JS全屏</title> <style> html:-moz-full-screen {background: red} html:-webkit-full-screen {background: red} html:fullscreen {background: red} </style> </head> <body> <a href="#" onClick="fullscreen()">fullscreen</a> | <a href="#" onClick="exitFullscreen()">exitFullscreen</a> <p id="state">no</p> <script> // 全屏 function fullscreen() { var docElm = document.documentElement; if (docElm.requestFullscreen) { docElm.requestFullscreen(); } else if (docElm.mozRequestFullScreen) { docElm.mozRequestFullScreen(); } else if (docElm.webkitRequestFullScreen) { docElm.webkitRequestFullScreen(); } else if (docElm.msRequestFullscreen) { docElm.msRequestFullscreen(); } } // 退出全屏 function exitFullscreen() { if (document.exitFullscreen) { document.exitFullscreen(); } else if (document.mozCancelFullScreen) { document.mozCancelFullScreen(); } else if (document.webkitCancelFullScreen) { document.webkitCancelFullScreen(); } else if (document.msExitFullscreen) { document.msExitFullscreen(); } } // 监听是否全屏 window.onload = function() { var elem = document.getElementById('state'); document.addEventListener('fullscreenchange', function() { elem.innerText = document.fullscreen ? 'yes': 'no'; }, false); document.addEventListener('mozfullscreenchange', function() { elem.innerText = document.mozFullScreen ? 'yes': 'no'; }, false); document.addEventListener('webkitfullscreenchange', function() { elem.innerText = document.webkitIsFullScreen ? 'yes': 'no'; }, false); document.addEventListener('msfullscreenchange', function() { elem.innerText = document.msFullscreenElement ? 'yes': 'no'; }, false); } </script> </body> </html>