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html solves the focus event of the current window
- 零下一度Original
- 2017-04-21 18:03:242971browse
This article is about the html window focus listening event. Let the editor describe it below. Interested friends can take a look at the
code as follows:
<!DOCTYPE html><html><head>
<meta charset="utf-8">
<title>使用html5的Page Visibility API来实现</title></head><body><p>
document.hidden：表示页面是否隐藏的布尔值。页面隐藏包括 页面在后台标签页中 或者 浏览器最小化 （注意，页面被其他软件遮盖并不算隐藏，比如打开的 sublime 遮住了浏览器）。</p><p>
document.visibilityState：表示下面 4 个可能状态的值</p><p>
hidden：页面在后台标签页中或者浏览器最小化</p><p>
visible：页面在前台标签页中</p><p>
prerender：页面在屏幕外执行预渲染处理 document.hidden 的值为 true</p><p>
unloaded：页面正在从内存中卸载</p><p>
Visibilitychange事件：当文档从可见变为不可见或者从不可见变为可见时，会触发该事件。</p></body><script type="text/javascript" src="jquery-3.0.0.min.js"></script><script type="text/javascript">
var hidden, visibilityChange; if (typeof document.hidden !== "undefined") {
hidden = "hidden";
visibilityChange = "visibilitychange";
} else if (typeof document.msHidden !== "undefined") {
hidden = "msHidden";
visibilityChange = "msvisibilitychange";
} else if (typeof document.webkitHidden !== "undefined") {
hidden = "webkitHidden";
visibilityChange = "webkitvisibilitychange";
} function handleVisibilityChange() {
if (document[hidden]) {
console.log("失去焦点");
} else {
console.log("得到焦点");
}
} // 判断浏览器的支持情况
if (typeof document.addEventListener === "undefined" || typeof document[hidden] === "undefined") {
console.log("此演示需要一个浏览器，如谷歌浏览器或Firefox，支持页面可见性API。");
} else { // 监听visibilityChange事件
document.addEventListener(visibilityChange, handleVisibilityChange, false);
}</script></html><!DOCTYPE html><html><head>
<meta charset="utf-8">
<title>使用html5的Page Visibility API来实现</title></head><body><p>
document.hidden：表示页面是否隐藏的布尔值。页面隐藏包括 页面在后台标签页中 或者 浏览器最小化 （注意，页面被其他软件遮盖并不算隐藏，比如打开的 sublime 遮住了浏览器）。</p><p>
document.visibilityState：表示下面 4 个可能状态的值</p><p>
hidden：页面在后台标签页中或者浏览器最小化</p><p>
visible：页面在前台标签页中</p><p>
prerender：页面在屏幕外执行预渲染处理 document.hidden 的值为 true</p><p>
unloaded：页面正在从内存中卸载</p><p>
Visibilitychange事件：当文档从可见变为不可见或者从不可见变为可见时，会触发该事件。</p></body><script type="text/javascript" src="jquery-3.0.0.min.js"></script><script type="text/javascript">
var hidden, visibilityChange; if (typeof document.hidden !== "undefined") {
hidden = "hidden";
visibilityChange = "visibilitychange";
} else if (typeof document.msHidden !== "undefined") {
hidden = "msHidden";
visibilityChange = "msvisibilitychange";
} else if (typeof document.webkitHidden !== "undefined") {
hidden = "webkitHidden";
visibilityChange = "webkitvisibilitychange";
} function handleVisibilityChange() {
if (document[hidden]) {
console.log("失去焦点");
} else {
console.log("得到焦点");
}
} // 判断浏览器的支持情况
if (typeof document.addEventListener === "undefined" || typeof document[hidden] === "undefined") {
console.log("此演示需要一个浏览器，如谷歌浏览器或Firefox，支持页面可见性API。");
} else { // 监听visibilityChange事件
document.addEventListener(visibilityChange, handleVisibilityChange, false);
}</script></html>Need to learn HTML students, please pay attention to php Chinese website html video tutorial, many html online video tutorials can be watched for free!
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