js实现浏览器下标签页间切换触发的事件

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]) {
        console.log('页面非激活');
    }else{
        console.log('页面激活')
    }
}
document.addEventListener(visibilityChangeEvent, onVisibilityChange);