退出全屏模式时捕获ESC事件 [英] Capture ESC event when exiting full screen mode

问题描述

对我的要求当我按下按钮
并在页面恢复正常模式时隐藏该div时，我必须以全屏模式显示特定的div。

Requirement for me I have to show a particular div in full screen mode when I press a button and hide that div when the page comes back to normal mode.

我可以使用以下代码实现全屏模式： -

I am able to achieve full screen mode with the code :-

function launchFullscreen(element) {
    if (element.requestFullscreen) {
        $('#bmessages').show();
        element.requestFullscreen();
    } else if (element.mozRequestFullScreen) {
        $('#bmessages').show();
        element.mozRequestFullScreen();
    } else if (element.webkitRequestFullscreen) {
        $('#bmessages').show();
        element.webkitRequestFullscreen();
    } else if (element.msRequestFullscreen) {
        $('#bmessages').show();
        element.msRequestFullscreen();
    } else {
        console.log("Fullscreen Unavailable");
    }
}

但是我无法捕获ESC或Deny事件所以我可以再次隐藏那个div？请告知我必须做什么？

But I am unable to capture ESC or Deny event so that I can again hide that div? Please advice what I have to do?

推荐答案

使用esc离开全屏时，Chrome不会触发按键事件。但是，会触发fullscreenchange事件。

Chrome does not fire a key event when using esc to leave fullscreen. However, a fullscreenchange event IS fired.

document.addEventListener('fullscreenchange', exitHandler);
document.addEventListener('webkitfullscreenchange', exitHandler);
document.addEventListener('mozfullscreenchange', exitHandler);
document.addEventListener('MSFullscreenChange', exitHandler);

function exitHandler() {
    if (!document.fullscreenElement && !document.webkitIsFullScreen && !document.mozFullScreen && !document.msFullscreenElement) {
        ///fire your event
    }
}  

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