js浏览器全屏模式

1、进入全屏

let docElm = document.documentElement;
//W3C
if(docElm.requestFullscreen) {
    docElm.requestFullscreen();
}

//FireFox
else if(docElm.mozRequestFullScreen) {
    docElm.mozRequestFullScreen();
}

//Chrome等
else if(docElm.webkitRequestFullScreen) {
    docElm.webkitRequestFullScreen();
}

//IE11
else if(elem.msRequestFullscreen) {
    elem.msRequestFullscreen();
}

2、退出全屏

//W3C
if (document.exitFullscreen) {
    document.exitFullscreen();
}
//FireFox
else if (document.mozCancelFullScreen) {
    document.mozCancelFullScreen();
}
//Chrome等
else if (document.webkitCancelFullScreen) {
    document.webkitCancelFullScreen();
}
//IE11
else if (document.msExitFullscreen) {
    document.msExitFullscreen();
}