var hiddenProperty = 'hidden' in document ? 'hidden' :
'webkitHidden' in document ? 'webkitHidden' :
'mozHidden' in document ? 'mozHidden' :
null;
var visibilityChangeEvent = hiddenProperty.replace(/hidden/i, 'visibilitychange');
var onVisibilityChange = function(){
if (document[hiddenProperty]) {
document.title='页面非激活';
}else{
document.title='页面激活';
}
}
document.addEventListener(visibilityChangeEvent, onVisibilityChange);
复制上面代码到console里执行下就看到效果了。
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