<script>

{% if site.data.meng.title.with_default_title == true %}
var hiddenText = '{{site.data.meng.title.hidden}}' +' '+ defaultTitle;
var visibleText = '{{site.data.meng.title.visible}}' +' '+ defaultTitle;
{% else %}
var hiddenText = '{{site.data.meng.title.hidden}}';
var visibleText = '{{site.data.meng.title.visible}}';
{% endif %}
var resetTime = {{site.data.meng.title.reset_time}};
document.addEventListener("visibilitychange", function() {
        if(document.visibilityState == "hidden" ){
        document.title = hiddenText;
    }
    if(document.visibilityState == "visible"){
        document.title = visibleText;
        setTimeout(function(){
            if(document.visibilityState == "visible"){
                document.title = defaultTitle;
            }
        },resetTime);
    }
}, false);

</script>