Hello reader! if you having the page and need to show the fancy loading on any text portion then you can see the code below.

For the loader and the text the css will go like this

#dummy {
    display: none;
}

#target {
    display:inline-block;
}

#overlay {
    display:none;
    position: absolute;
    background: rgba(0,0,0,.5);
}

.fancybox-inner iframe {
    display: block;
    width: 100%;
    height: 100%;
}

And the the HTML code for this is go like this as example

<ul id="target">
    <li>
       1111111111111
    </li>
    <li>
       22222222222222
    </li>
    <li>
       33333333333333
    </li>
    <li>
       44444444444444
    </li>
    <li>
       555555555555555
    </li>
    <li>
       66666666666666
    </li>
</ul>
<div id="overlay"></div>
<br>
<br>    
<div type="button" class="on">on </div>
<div type="button" class="off">off </div>

For the action on clicked on ON/OFF button you just need to write js code at the bottom of page.

$(".on").click(function(){
    var target = $('#target');
    var overlay = $('#overlay');
    overlay.width(target.width()).height(target.height()).css({
        'left': target.position().left,
        'top': target.position().top
    }).fadeIn(200);
    $.fancybox.showLoading();
    $('#fancybox-loading').css({
        'left': (target.width() - $('#fancybox-loading').width()) / 2,
        'top': (target.height() - $('#fancybox-loading').height()) / 2,
        'margin': 0
    });
});
$(".off").click(function(){
    $('#overlay').fadeOut(200);
    $.fancybox.hideLoading();  
});