<html> <head> <title>js指定区域全屏</title> <style> #fulldiv { background: #fff; width: 100%; text-align: center; height: 100%; } </style> </head> <body> <h1>指定区域全屏测试</h1> <button id="btn">全屏按钮</button> <div id="content-main"> <img src="C:UsersguobinDesktopIMG_3163.PNG" /> </div> </body> <script> var fullscreen = false; let btn = document.getElementById('btn'); let fullarea = document.getElementById('content-main') btn.addEventListener('click',function(){ if (fullscreen) { // 退出全屏 if (document.exitFullscreen) { document.exitFullscreen(); } else if (document.webkitCancelFullScreen) { document.webkitCancelFullScreen(); } else if (document.mozCancelFullScreen) { document.mozCancelFullScreen(); } else if (document.msExitFullscreen) { document.msExitFullscreen(); } } else { // 进入全屏 if (fullarea.requestFullscreen) { fullarea.requestFullscreen(); } else if (fullarea.webkitRequestFullScreen) { fullarea.webkitRequestFullScreen(); } else if (fullarea.mozRequestFullScreen) { fullarea.mozRequestFullScreen(); } else if (fullarea.msRequestFullscreen) { // IE11 fullarea.msRequestFullscreen(); } } fullscreen = !fullscreen; }) </script> </html>