代码显示效果演示

var originTitle = document.title;

var titleTime;

document.addEventListener("visibilitychange", function() {

if (document.hidden) {

document.title = "(つェ⊂) 我藏好了哦~ " + originTitle;

clearTimeout(titleTime);

}

else {

document.title = "(*´∇｀*) 被你发现啦~ " + originTitle;

titleTime = setTimeout(function() {

document.title = originTitle;

}, 2000);

}

})