JSFiddle - React, Tailwind, and code Playground

HTML

<div class='my_div' id='div_1' style="visibility: hidden">1</div>
<div class='my_div' id='div_2' style="visibility: hidden">2</div>
<div class='my_div' id='div_3' >3</div>
<div class='my_div' id='div_4' style="visibility: hidden">4</div>

JavaScript

alert($("div.my_div").filter(function(){ return $(this).css('visibility') === "hidden"; }).map(function(){ return this.id }).get().join(''));