打开多个页面，怎么用获取哪个页面正在活动中？

来源：互联网发布：关注网站源码编辑：程序博客网时间：2024/06/06 02:14

当页面活动状态变化，会触发visibilitychange事件，下面是代码

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<script type="text/javascript">
//各种浏览器兼容
var hidden, state, visibilityChange;
if (typeof document.hidden !== "undefined") {
hidden = "hidden";
visibilityChange = "visibilitychange";
state = "visibilityState";
} else if (typeof document.mozHidden !== "undefined") {
hidden = "mozHidden";
visibilityChange = "mozvisibilitychange";
state = "mozVisibilityState";
} else if (typeof document.msHidden !== "undefined") {
hidden = "msHidden";
visibilityChange = "msvisibilitychange";
state = "msVisibilityState";
} else if (typeof document.webkitHidden !== "undefined") {
hidden = "webkitHidden";
visibilityChange = "webkitvisibilitychange";
state = "webkitVisibilityState";
}

// 添加监听器，在title里显示状态变化
document.addEventListener(visibilityChange, function() {
document.title = document[state];
}, false);

// 初始化
document.title = document[state];
</script>
</body>
</html>

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打开多个页面，怎么用获取哪个页面正在活动中 ？

打开多个页面，怎么用获取哪个页面正在活动中？