html - FlexSlider with thumbnail control?

Question

I am trying to use the FlexSlider to create a gallery. Reading the documentation I saw that it use an attribute data-thumb into html tag but I ain't finding this attribute to use on html tag.

I am following this example

How could I fix this ?

trying

HTML

<div class="flexslider-thumbnails">
         <ul class="slides">
                 <li data-thumb="img-thumb.jpg">
                      <img src="~/Imagens/PRODUTOS/@Url.Content(img.nome)" />
                 </li>                                
         </ul>   
</div>

JQuery

$(window).load(function () {
    $('.flexslider-thumbnails').flexslider({
        animation: "slide",
        controlNav: "thumbnails",
    });
});

question from:https://stackoverflow.com/questions/66055394/flexslider-with-thumbnail-control

Answer 1

Waitting for answers