我的屏幕上有两个按钮。每个人都会触发一段JavaScript代码以进入和退出全屏模式。
按钮1:进入全屏模式
按钮2:退出全屏模式
如果我首先单击按钮1 ,它将带我进入全屏模式,然后如果我单击按钮2 ,它将退出全屏模式。
但是,如果我使用 F11 或通过 chrome菜单进入全屏模式,则按钮2 不再起作用。
为什么会发生这种情况以及如何解决?
按钮1的代码:
goFullscreen();
function goFullscreen() {
var el = document.documentElement,
rfs = el.requestFullscreen
|| el.webkitRequestFullScreen
|| el.mozRequestFullScreen
|| el.msRequestFullscreen
;
rfs.call(el);
}
按钮2的代码:
document.webkitCancelFullScreen();
我也没有运气尝试过这个
document.webkitExitFullscreen();
答案 0 :(得分:3)
您应该在执行之前进行验证。...
function FullScreen(divID) {
fnFullScreen(divID, !IsFullScreen());
}
function IsFullScreen() {
return (document.fullscreenElement && document.fullscreenElement !== null) ||
(document.webkitFullscreenElement && document.webkitFullscreenElement !== null) ||
(document.mozFullScreenElement && document.mozFullScreenElement !== null) ||
(document.msFullscreenElement && document.msFullscreenElement !== null);
}
function fnFullScreen(divID, TurnOn) {
if (TurnOn) {
var docElm = $('#' + divID).parent()[0];
if (docElm.requestFullscreen) {
docElm.requestFullscreen();
} else if (docElm.mozRequestFullScreen) {
docElm.mozRequestFullScreen();
} else if (docElm.webkitRequestFullScreen) {
docElm.webkitRequestFullScreen();
} else if (docElm.msRequestFullscreen) {
docElm.msRequestFullscreen();
}
$('#' + divID).css("min-height", "100vh");
$('.btnFullScreen').html('Exit Full Screen');
} else {
if (document.exitFullscreen) {
document.exitFullscreen().catch(() => { });
} else if (document.webkitExitFullscreen) {
document.webkitExitFullscreen();
} else if (document.mozCancelFullScreen) {
document.mozCancelFullScreen();
} else if (document.msExitFullscreen) {
document.msExitFullscreen();
}
$('#' + divID).css("min-height", "");
$('.btnFullScreen').html('Full Screen');
}
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="body">
<div id="div1"> <button class="btnFullScreen" onclick="FullScreen('div1')">Full Screen</button> click to full screen</div>
</div>