<html>
<head>
<meta charset="utf-8">
<title>jQuery判断当前页面是否被浏览</title>
</head>
<body>
<script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.min.js"></script>
<script>
$(document).on('visibilitychange', function(e) {
if (e.target.visibilityState === "visible") {
document.title = '被发现啦!';
} else if (e.target.visibilityState === "hidden") {
document.title = '藏好啦!';
}
});
</script>
</body>
</html>
